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Nanomaterials with unique structures and exotic magnetic phenomena are always intriguing; however, the direct correlation of structural and magnetic ordering up to a few nanometers remains critical.

We have investigated the Mn2PtAl Heulser alloy to unravel its structural, magnetic, calorimetric and electronic structure properties.

The year 2020 has been an exceptional year for countries across the globe In India, apart from Covid-19, one of the important changes that took place was the development of the New Education Policy (NEP) 2020 Time by time, various committees have recommended to increase the allocation of the budget for education to 6% of the GDP, this has lead to the interests of researchers This paper aims to identify the concerns and focus of NEP 2020 The authors have utilized qualitative data analysis techniques to understand critical areas of focus of policy documents and computer-assisted qualitative data analysis software to address the issues The research also uses data from Twitter The data (policy documents) was downloaded from the Ministry of Human Resource Development (MHRD) website For a better understanding of the collected data, Word Cloud, TreeMap, Project Map, and The Mind Map, along with the graphical representation of sentiments of stakeholders, is presented in the paper The paper identifies three crucial aspects of the policy - course, language, and students, for the higher education sector This paper also discusses the sentiment analysis, related to NEP 2020 It was found that most of people consider the policy as a positive and welcoming step © 2020 All Rights Reserved

The electronic structure and optical properties of the Heusler alloys Co2NiGa, Co2NiAl, Co2FeGa, and Co2FeAl are reported and compared in this work. In the Fe-based alloys, Co2FeGa and Co2FeAl, the electronic structure is found to have 100% spin polarization with the indirect energy gap in the [Formula: see text]-[Formula: see text] direction, whereas in Co2NiGa and Co2NiAl, the density of states is metallic in both spin projections with spin polarization of 55% (Co2NiGa) and 37% (Co2NiAl). Total and Co partial magnetic moments of all Heusler alloys for the optimized lattice parameters were found in a good agreement with previous calculations and experimental data. The frequency dependence of the real and imaginary parts of the complex dielectric constant for the Heusler alloys is studied in the spectrum region of 0.08–5 eV. The research results are discussed based on the performed calculations of the electronic structure. It was found that the character of variations of the spectral parameters of the alloys is typical for media with the metallic conductivity. In the IR region, the mechanism of the intraband acceleration of electrons by the light wave field dominates. The significant changes in the optical spectrum, magnetic moment, spin polarization and electronic structure were revealed in Co2MGa and Co2MAl for different M atoms which motivate further investigations of the Co-based Heusler alloys as promising materials for spintronics.

The frequency dependences of the real part e1(ω) and imaginary part e2(ω) of the complex dielectric constant of the Co2NiAl Heusler alloy are studied in a region of spectrum of 0.08–5 eV. It was found that the character of variations of the spectral parameters of the Co2NiAl ally is typical of media with metallic conductivity. In the IR region, the mechanism of intraband acceleration of electrons by the field of light wave dominates. The contribution of interband electron transitions is marked even at the energies E ≥ 0.15 eV. Results of the investigations are discussed based on the performed electronic structure calculations. It is shown that the main contribution to the resulting optical conductivity dependence is made by interband electron transitions in the band with spins opposite to the magnetization direction.

We report on the structural and magnetic properties of Ru substituted skyrmion metal MnSi i.e. Mn 1 − x Ru x Si for the nominal compositions of 0 ⩽ x ⩽ 0.5 . The composition–temperature (x–T) phase diagram illustrates the substitution-driven changes in the magnetic behavior. It is confirmed that the magnetic ordering temperature (para-to helimagnetic) T t r and the effective magnetic μ e f f moment decrease with increasing x. This indicates the suppression of magnetic order by the substitution of Ru in MnSi. However, the magnetic nature is sustained up to a concentration of about x = 0.1 above which the system exhibits spin-glass like nature as inferred from the negative Curie–Weiss temperature θ C W , reduced magnetic moment (of the order 10 − 2 μ B f . u . − 1 ) and linear M–H (at 2 K) in x = 0.5. Mn 1 − x Ru x Si is found to avoid the quantum phase transition and exhibits a composition-driven magnetic to spin-glass like transition.

The manifestation of the structural and magnetic properties of Co substituted TiFe2 is investigated using powder X-ray diffraction, magnetization and density functional theory calculations. The alloys TiFe2 and TiFeCo crystallize in the hexagonal structure (P63/mmc) with a reduction in the lattice parameters of TiFeCo (by about 0.51% in a and 0.64% in c) when compared to TiFe2. On the other hand, TiCo2 crystallizes in the cubic structure (Fd3[combining macron]m). A structural transition from hexagonal to cubic is anticipated for a composition with x ∈ [0.5, 1]. The non-collinear antiferromagnetic (AFM) spin structure (formed by 6h Fe atoms) of TiFe2 with Néel temperature TN ∼ 275 K is reported at zero magnetic field H. Meanwhile, a magnetic field-induced collinear antiferromagnetic spin structure is suggested by magnetization measurements and supported by density functional theory calculations. The magnetization of TiFeCo shows a weak-ferromagnetic (FM)-like transition around 204 K, followed by a broad hump at 85.5 K and H = 200 Oe. Ferromagnetic interactions are weakened, causing the hump to disappear due to the possible transfer of electrons between Fe and Co. TiCo2 shows compensated ferrimagnetism with magnetization of the order of 10-5μB f.u.-1 and a linear increase of M with H at 5 K. The presence of a non-collinear AFM spin structure in TiFe2, a reduced magnetic moment in TiFeCo due to the charge transfer between Co and Fe, and compensated ferrimagnetism in TiCo2 promise a rich phase diagram of Ti(Fe1-xCox)2 alloys and the possible potential of these alloys for use in spintronics applications.

We report the theoretical prediction of a class of spintronic materials, namely, bipolar magnetic semiconductors (BMSs), also supported by our experimental data. BMSs possess a unique band structure with unequal band gaps for spin-up and spin-down channels and thus are useful for tunable spin-transport-based applications such as spin filters. The valence band and conduction band in BMSs approach the Fermi level through opposite spin channels and hence facilitate reversible spin polarization that is controllable via applied gate voltage. We report the quaternary Heusler alloy VNbRuAl to exactly possess the band structure of a BMS. A rigorous normal x-ray diffraction (XRD) fitting along with synchrotron XRD data confirms that this alloy crystallizes in the LiMgPdSn structure with partial $\mathrm{B}2$ disorder. Transport measurements show a two-channel semiconducting behavior and a quasilinear dependence of negative magnetoresistance, indicating the possible semiconducting nature. The thermoelectric power data not only confirm the semiconducting nature but also give a strong indication of the BMS nature. Interestingly, VNbRuAl also appears to show features of a fully compensated ferrimagnetic (FCF) behavior with vanishing magnetization and significantly high ordering temperature ($g900 \mathrm{K}$). Theoretical simulations of the special quasirandom structure predict partial B2 disorder to be mainly responsible for the coexistent BMS and FCF-like behavior. This study opens up the possibility of finding another class of materials for antiferromagnetic spintronics, with great significance for both fundamental and applied fronts.

We report a combined theoretical and experimental study of a novel quaternary Heusler system CoFeVSb from the view point of room temperature spintronics and thermoelectric applications. It crystallizes in cubic structure with small DO$_3$-type disorder. The presence of disorder is confirmed by room temperature synchrotron X-ray diffraction(XRD) and extended X-ray absorption fine structure (EXAFS) measurements. Magnetization data reveal high ordering temperature with a saturation magnetization of 2.2 $\mu_B$/f.u. Resistivity measurements reflect half-metallic nature. Double hysteresis loop along with asymmetry in the magnetoresistance(MR) data reveals room temperature spin-valve feature, which remains stable even at 300 K. Hall measurements show anomalous behavior with significant contribution from intrinsic Berry phase. This compound also large room temperature power factor ($\sim0.62$ mWatt/m/K$^{2}$) and ultra low lattice thermal conductivity ($\sim0.4$ W/m/K), making it a promising candidate for thermoelectric application. Ab-initio calculations suggest weak half-metallic behavior and reduced magnetization (in agreement with experiment) in presence of DO$_3$ disorder. We have also found an energetically competing ferromagnetic FM)/antiferromagnetic (AFM) interface structure within an otherwise FM matrix: one of the prerequisites for spin valve behavior. Coexistence of so many promising features in a single system is rare, and hence CoFeVSb gives a fertile platform to explore numerous applications in future.

In the present report, the microstructural, magnetic and exchange bias properties of Mn rich Mn-Ni-Sn Heusler alloy ribbons have been investigated. We report a giant exchange bias (EB) field of around 6.31 kOe at low temperature (2 K) in the Mn rich Mn50Ni42Sn8 Heusler alloy ribbons, which is found to be significantly larger than that reported in other systems. Giant EB is attributed to the strong exchange coupling between the spin glass/antiferromagnetic phases. The temperature dependence of EB has also been studied in the present report. The microstructural, DC and AC magnetization measurements confirm its first order martensitic transition (i.e. above room temperature) and spin glass nature.

We report structural, magnetic and electrical properties of Pd2MnGa Heusler alloy. The alloy is found to crystallize in the cubic structure with Fm-3m space group and lattice parameter a ∼ 6.12 A. Magnetization measurement showed ferromagnetic type transition, but the paramagnetic Curie temperature is about -116 K and effective magnetic moment of 4.47 µB/f.u. The ferromagnetic transition is found to be at about 197 K. Electrical resistivity of the alloy suggests the metallic behavior with a magnetic transition around the magnetic transition.

We report the structural, magnetic and electronic properties of quaternary Heusler alloy CoRhTiAl. Room temperature XRD analysis reveals that the alloy crystallizes in B2-type structure instead of perfectly ordered Y-type structure due to 50 % disorder between the tetrahedral sites (Co and Rh) as well as octahedral sites (Ti and Al). The ab-initio simulations with GGA+U method predict a perfectly half-metallic ferrimagnetic nature with a gap in the minority spin-channel and thus, a high spin polarization.

We study the structural, magnetic, and electronic properties of quaternary Heusler alloy CoRuMnSb. Room temperature XRD analysis reveals that the alloy crystallizes in a perfectly ordered Y-type structure. The experimental saturation magnetization value is in good agreement with the Slater-Pauling rule, indicating half-metallicity. The Curie temperature is found to be >400 K. The ab-initio simulations predict a perfectly half-metallic ferromagnetic nature with a gap in the minority spin-channel. Thus, ordered structure, integer moment, high Tc, half-metallic nature, and high spin-polarization make CoRuMnSb alloy a potential candidate for spintronic applications.

In the present work, polycrystalline Ni50Mn36Sn14-xInx (x = 0, 1, 2 and 3) Heusler alloys were prepared. The influence of In substitution for Sn on the crystal structure, martensitic transition (MT) and magnetic properties have been investigated for these alloys. Structural analysis indicate that the samples possess L21 structure at room temperature. With increasing In content, the martensitic transition shifts to a higher temperature, while the Curie temperature of austenite phase moves to a lower temperature. The maximum entropy change ( Δ SM) max near the martensitic transition is found to be 8.4 J/kgK, 9.8 J/kgK, 10.1 J/kgK and 19.2 J/kgK for x = 0, 1, 2 and 3 respectively, for a field change of 50 kOe. The entropy change around the Curie temperature of the austenite phase is found to be – 2.9 J/kgK, −1.8 J/kgK, −4.1 J/kgK and −3.9 J/kgK respectively for x = 0, 1, 2 and 3 alloys, for a field change of 50 kOe. The effective RCP values are 80 J/kg, 15.6 J/kg, 65.8 J/kg and 69.4 J/kg for x = 0, 1, 2 and 3 alloys respectively, near the first order transition region. The RCP values are higher around the second order transition region due to the broad nature of Δ SM curves. The corresponding values are 114 J/kg, 92 J/kg, 121 J/kg and 132 J/kg for x = 0, 1, 2 and 3 alloys, respectively. Moreover, the critical behavior of Ni50Mn36Sn14-xInx (x = 1, 2 and 3) Heusler alloys around the ferromagnetic-paramagnetic transition region of austenite phase is studied from the field dependence of magnetic entropy change. The critical exponent values are close to the theoretical prediction of mean field model with a slight deviation.

We report the theoretical prediction of a class of spintronic materials, namely, spin semimetals, which is indirectly supported by experimental data measured for one such system. The band structure of this class of materials is such that one of the spin bands resembles that of a semimetal, while the other is similar to that of an insulator/semiconductor. We show that quaternary Heusler alloy FeRhCrGe possesses band features characterizing it as a spin semimetal. It is found to possess a magnetic moment of $3{\ensuremath{\mu}}_{B}$ and a Curie temperature of 550 K. Measurements below 300 K show weakly temperature dependent electrical conductivity and a moderate Hall effect. Band structure calculations also reveal that the spin-up (semimetallic) band shows a strong signature of type-II Weyl semimetallic behavior. As such, this study opens up the possibility of a class of materials with combined spintronic and topological properties, which is important from both fundamental and applied perspectives.

We examine causal relationships among the macroeconomic entities tourism and output dynamics in India, using the frequency–domain causality approach. Our results show that there is a bidirectional causality between openness and tourism as well as between output and tourism, at various frequency bands. Hence, this study suggests a multiplier effect of tourism on the Indian economy.

The frequency dependences of the real part epsilon(1)(omega) and imaginary part epsilon(2)(omega) of the complex dielectric constant of the Heusler alloys Co2TiGe and Co2TiSn have been studied in the spectral range of 0.1-5 eV. It has been established that the interband electron transitions play a dominant role in the formation of the optical properties of these alloys. An anomalous behavior of the optical properties in the IR range of spectrum, namely, the absence of the Drude component of the optical conductivity sigma(omega), has been revealed. The results of the studies have been discussed based on the calculations of the electronic structure of the alloys.

This study attempts to investigate the relationship between international tourism, trade, and economic growth in India over the period from April 1991 to July 2012. To account for potential asymmetries in the relationship, we make use of new asymmetric Granger-causality tests and frequency analysis. We show that there is bidirectional Granger-causality between trade and tourism in positive components, whereas unidirectional Granger-causality runs from tourism to trade for negative components. Moreover, we find evidence of bidirectional Granger-causality between economic growth and tourism in positive components, but unidirectional Granger-causality running from economic growth to tourism for negative components. On the other hand, the results from frequency analysis provide evidence of Granger-causality between trade and tourism, and also between economic growth and tourism, at different frequency bands.

We report on the observation of double transition - a first order and a second order transition in Gd5Si2-xCoxGe2 with x = 0, 0.1, 0.2 and 0.4 with the appearance of short-range ferromagnetic correlations. The first order phase transition is due to a combined magnetostructural transition from monoclinic paramagnetic phase to orthorhombic ferromagnetic phase on cooling while the second order transition arises from an orthorhombic paramagnetic to ferromagnetic phase on cooling. Structural studies show that the substituted compounds crystallize in a combination of Gd5Si2Ge2 and Gd5Si4 phases. Low-temperature X-ray diffraction measurements confirm the complete transformation from monoclinic to orthorhombic phase. DC magnetization measurements reveal an anomalous low field magnetic behaviour indicating a Griffiths-like phase. This unusual behaviour is attributed to the local disorder within the crystallographic structure indicating the presence of short-range magnetic correlations and ferromagnetic clustering, which is stabilized and enhanced by competing intra-layer and inter-layer magnetic interactions. The magnetostructural transition results in entropy changes -Delta S-M) of 9J kg(-1) K-1 at 260 K for x=0.1,8.5 Jkg(-1) K-1 at 245 K for x=0.2 and 4.2J kg(-1) K-1 at 210 K for x = 0.4 for a field change of 50 kOe. Co substitution induces compelling crystallographic and magnetoresponsive effects in the Gd-Si-Ge system, which could be useful for potential and smart applications such assolid-state magnetic refrigeration and sensitive magnetic switching from paramagnetic to ferromagnetic state. Universal curve analysis has been carried out on the substituted samples to study the order of the magnetic transition.

In this study, we intended to analyze the socioeconomic, political and environment factors affecting the sustainable wellbeing of nations (measured by the Happy Planet Index), for a sample of 108 countries for the year 2009.The empirical evidence showed that Human Development Index (HDI), Carbon emission, political freedom and colonial background of nations are significant predictors of the sustainable wellbeing of nations. HDI has a direct effect on HPI of nations, while the level of carbon emission is negatively related with HPI. The HPI levels among different political regimes are different, while the countries without colonial background are better off in terms of achieving sustainable wellbeing than countries with colonial background. .

Spin gapless semiconductors (SGSs) are an interesting class of materials which bridge the gap between semiconductors and half-metallic ferromagnets. This class of materials shows band gap in one of the spin channels and a zero band gap in the other, and thus promote tunable spin transport. Here, we present structural, electronic, magnetic, and transport properties of Co-rich SGS ${\mathrm{Co}}_{1+x}{\mathrm{Fe}}_{1\ensuremath{-}x}\mathrm{CrGa}$ using both theoretical and experimental techniques. The key advantage of Co-rich samples ${\mathrm{Co}}_{1+\mathit{x}}{\mathrm{Fe}}_{1\ensuremath{-}\mathit{x}}\mathrm{CrGa}$ is the high Curie temperature $(T{}_{C})$ and magnetization, without compromising the SGS nature (up to $x=0.4)$, and hence our choice. The quaternary Heusler alloys ${\mathrm{Co}}_{1+\mathit{x}}{\mathrm{Fe}}_{1\ensuremath{-}\mathit{x}}\mathrm{CrGa}\phantom{\rule{4pt}{0ex}}(x=0.1$ to 0.5) are found to crystallize in LiMgPdSn-type structures having space group $F\overline{4}3m$ (number of 216). The measured Curie temperature increases from 690 K $(x=0)$ to 870 K $(x=0.5)$. The obtained ${\mathrm{T}}_{\mathrm{C}}$ for $x=0.3$ (790 K) is found to be the highest among all previously reported SGS materials. Observed magnetization values follow the Slater-Pauling rule. Measured electrical resistivity, in the temperature range of 5--350 K, suggests that the alloys retain the SGS behavior up to $x=0.4$, beyond which it reflects metallic character. Unlike conventional semiconductors, the conductivity value $({\ensuremath{\sigma}}_{\mathit{xx}})$ at 300 K lies in the range of 2289 S ${\mathrm{cm}}^{\ensuremath{-}1}$ to 3294 S ${\mathrm{cm}}^{\ensuremath{-}1}$, which is close to that of other reported SGS materials. The anomalous Hall effect is comparatively low. The intrinsic contribution to the anomalous Hall conductivity increases with $x$, which can be correlated with the enhancement in chemical order. The anomalous Hall coefficient is found to increase from 38 S/cm for $x=0.1$ to 43 S/cm for 0.3. Seebeck coefficients turn out to be vanishingly small below 300 K, another signature for being SGS. All the alloys (for different $x)$ are found to be both chemically and thermally stable. Simulated magnetization agrees fairly with the experiment. As such, Co-rich CoFeCrGa is a promising candidate for room temperature spintronic applications, with enhanced $T{}_{C}$, magnetic properties, and SGS nature.

In this report, structural, electronic, magnetic and transport properties of quaternary Heusler alloys CoRuMnGe and CoRuVZ (Z = Al, Ga) are investigated. All the three alloys are found to crystallize in cubic structure. CoRuMnGe exhibits L2$_1$ structure whereas, the other two alloys have B2-type disorder. For CoRuMnGe and CoRuVGa, the experimental magnetic moments are in close agreement with the theory as well as those predicted by the Slater-Pauling rule, while for CoRuVAl, a relatively large deviation is seen. The reduction in the moment in case of CoRuVAl possibly arises due to the anti-site disorder between Co and Ru sites as well as V and Al sites. Among these alloys, CoRuMnGe has the highest T$\mathrm{_C}$ of 560 K. Resistivity variation with temperature reflects the half-metallic nature in CoRuMnGe alloy. CoRuVAl shows metallic character in both paramagnetic and ferromagnetic states, whereas the temperature dependence of resistivity for CoRuVGa is quite unusual. In the last system, $\rho$ vs. T curve shows an anomaly in the form of a maximum and a region of negative temperature coefficient of resistivity (TCR) in the magnetically ordered state. The ab initio calculations predict nearly half-metallic ferromagnetic state with high spin polarization of 91, 89 and 93 \% for CoRuMnGe, CoRuVAl and CoRuVGa respectively. To investigate the electronic properties of the experimentally observed structure, the Co-Ru swap disordered structures of CoRuMnGe alloy are also simulated and it is found that the disordered structures retain half-metallic nature, high spin polarization with almost same magnetic moment as in the ideal structure. Nearly half-metallic character, high T$\mathrm{_C}$ and high spin polarization make CoRuMnGe alloy promising for room temperature spintronic applications., Comment: 11 pages, 12 figures

Superhydrophobicity is also known as lotus effect which makes the water to roll off and bounce when liquid droplets resting on the surface. In nature it is used by plants for self-cleaning purpose and by animals for anti-adhesion skin. The superhydrophobic surface has been mimicked and used in the field of aerospace, textiles, power line, solar cell and so on. In this review we provide the basic theories of wetting, wetting transition models of superhydrophobicity, parameters of laser beam and post processing (heat treatment only) after laser irradiation related to contact angle. Laser parameters play a vital role in producing surface topography. The surface topography may be consists of ripples, dual surface roughness on the laser textured surface. Based on the magnitude of laser parameters the different surface morphology can be obtained. The surface morphology will vary for the different laser system such femto, pico or nano second laser system. The present review aims to report the understanding of laser parameters in order to texture the expected surface structure by controlling the laser parameters.

Spin-gapless semiconductors (SGSs) are new states of quantum matter, which are characterized by a unique spin-polarized band structure. Unlike conventional semiconductors or half-metallic ferromagnets, they carry a finite bandgap for one spin channel and a close (zero) gap for the other and thus are useful for tunable spin transport applications. It is one of the latest classes of materials considered for spintronic devices. A few of the several advantages of SGS include (i) a high Curie temperature, (ii) a minimal amount of energy required to excite electrons from the valence to conduction band due to zero gap, and (iii) the availability of both charge carriers, i.e., electrons as well as holes, which can be 100% spin-polarized simultaneously. In this perspective article, the theoretical foundation of SGS is first reviewed followed by experimental advancements on various realistic materials. The first band structure of SGS was reported in bulk Co-doped PbPdO 2, using first-principles calculations. This was followed by a large number of ab initio simulation reports predicting SGS nature in different Heusler alloy systems. The first experimental realization of SGS was made in 2013 in a bulk inverse Heusler alloy, Mn 2CoAl. In terms of material properties, SGS shows a few unique features such as nearly temperature-independent conductivity ( σ) and carrier concentration, a very low temperature coefficient of resistivity, a vanishingly small Seebeck coefficient, quantum linear magnetoresistance in a low temperature range, etc. Later, several other systems, including 2-dimensional materials, were reported to show the signature of SGS. There are some variants of SGSs that can show a quantum anomalous Hall effect. These SGSs are classic examples of topological (Chern) insulators. In the later part of this article, we have touched upon some of these aspects of SGS or the so-called Dirac SGS systems as well. In general, SGSs can be categorized into four different types depending on how various bands corresponding to two different spin channels touch the Fermi level. The hunt for these different types of SGS materials is growing very fast. Some of the recent progress along this direction is also discussed.

The electronic structure and the optical properties of the HoCoSi and ErNiSi compounds are studied. Spin-polarized band calculations are performed in the local electron density approximation corrected for the strong electron–electron interactions in the 4f shell of a rare-earth ion (LSDA + U method [11]). The optical constants are measured by ellipsometry in a wide wavelength range, and the frequency dependences of a number of spectral parameters are determined. The calculated densities of states are used to interpret the structural features of the interband optical conductivities of the intermetallic compounds.

The martensitic transition and exchange bias properties of the Heusler alloy system Ni50Mn36Sn14-xSix (x = 0, 1, 2 and 3) have been investigated. As the Si concentration increases, the martensitic transition temperature decreases while the Curie temperature of the austenite phases shows a slight increase. The temperature dependence of AC susceptibility with different frequencies at a low temperature regime was analyzed and the frequency dependence of the spin freezing temperature (T-f) showing a conventional critical slowing down relation confirms the spin glass behavior at low temperatures. Furthermore, the sample was recognized as a reentrant spin glass with both ferromagnetic and glassy states coexisting at least in the field cooled state. Due to these competing magnetic interactions, all the studied alloys exhibit exchange bias at low temperatures. For x = 2 alloy, an exchange bias field of 235 Oe is observed. However, on further increasing x, the exchange bias decreases. Therefore, it is quite evident that the unidirectional anisotropy decreases as a function of Si concentration. The double shifted hysteresis loop after zero field cooling and training effect strongly support the presence of exchange bias in these alloys. The dependencies of EB on various parameters like temperature and cooling field have also been investigated.

We report a combined theoretical and experimental investigation of half-metallic ferromagnetism in equiatomic quaternary Heusler alloy CoRuMnSi. Room temperature XRD analysis reveals that the alloy crystallizes in L21 disorder instead of pristine Y-type structure due to 50% swap disorder between the tetrahedral sites, i.e., Co and Ru atoms. Magnetization measurements reveal a net magnetization of 4 $\mu_B$ with Curie temperature of ~780 K. Resistivity measurement reveals the presence of localization effect below 35 K while above 100 K, a linear dependence is observed. Resistivity behavior indicates the absence of single magnon scattering, which indirectly supports the half-metallic nature. The majority spin band near the Fermi level clearly indicates the overlap of flat eg bands with sharply varying conduction bands that are responsible for the localization. In-depth analysis of the projected atomic d-orbital character of band structure reveals unusual bonding, giving rise to the flat eg bands purely arising out of Ru ions. Co-Ru swap disorder calculations indicate the robustness of half-metallic nature, even when the structure changes from Y-type to L21-type, with no major change in the net magnetization of the system. Thus, robust half-metallic nature, stable structure, and high Curie temperature make this alloy quite a promising candidate to be used as a source of highly spin-polarized currents in spintronic applications., Comment: 9 pages, 8 figures