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BackgroundCompared to urban children, children living in rural areas of most countries, including China, are at higher risk of suffering unintentional injuries. Most proven injury prevention interventions, however, are rarely implemented in rural China due to lack of resources. Mobile health interventions are low-cost and easy-to-implement, facilitating implementing injury prevention in resource-limited areas (e.g., rural areas). This study is designed to examine the effectiveness of an app-based intervention for unintentional injury prevention among rural preschoolers in China. MethodsA single-blind, 18-month, parallel-group cluster randomized controlled trial with 1:1 allocation ratio will be implemented in 2 rural areas of China (Yang County, Shaanxi Province, and Shicheng County, Jiangxi Province). In total, at least 3508 rural caregivers of preschoolers aged 3-6 years old who own a smartphone will be recruited from 24 preschools. Clusters will be randomized at the preschool level and allocated to the control group (receiving routine school-based education plus app-based parenting education excluding unintentional injury prevention) or the intervention group (receiving routine school-based education plus app-based parenting education including unintentional injury prevention). External support strategies will be adopted by local partners to minimize user fatigue, non-compliance, and attrition. Data collection will be conducted at baseline and then every 3 months during the 18-month follow-up time period. Intention-to-treat (ITT) data analysis will be implemented. Missing values will be imputed by using the Expectation Maximization algorithm (EM). Generalized estimation equations (GEE) will test the overall effectiveness of the app-based intervention. A per-protocol (PP) sensitivity analysis will be conducted to test the robustness of results. Subgroup analyses will follow the strategies for primary analyses.ResultsThe primary outcome measure is the incidence rate of unintentional injury among preschoolers during the study period. Secondary outcome measures comprise longitudinal changes in caregiver’s attitudes, caregiver-reported supervision behaviors, and caregiver-assessed home environment safety surrounding child unintentional injury prevention in the last week using a standardized audit instrument.ConclusionThe app-based intervention is expected to be feasible and effective over the 18-month intervention period. If the app is demonstrated effective as hypothesized, we will initiate processes to generalize and popularize it broadly to rural child caregivers across China. Trial registrationChiCTR2000037606, registered on August 29, 2020. more...

Background Media reports may influence criminal behavior that leads to violence against doctors. Little is known about the characteristics of media reports on patient violence against their doctors. Methods Based on the international and domestic guidelines for media reports, we developed a checklist to assess adherence of Chinese media reports to recommended principles. We adopted a seed approach to search influential violence stories. Reports were assessed using the unified coding scheme by different coders; the conflicts between raters were resolved through discussion. Results In total, 17,222 media reports were captured; 788 met inclusion criteria. 49.5% and 52.7% of 788 included reports mentioned real and complete names of writer and editor, respectively. of 329 reports including quotes or opinions from doctors, patients, and hospital administrative personnel, only 15.79%, 11.25% and 18.62% respectively specified they had obtained the consent of the interviewees. 21.6% of reports including all specifically-coded details of the violent acts against doctors (time, place, methods and perpetrators), and 43.5% of reports included some details. Only 18.7% of media reports offered suggestions for seeking professional help in case doctors are threatened by violence and 11.3% offered contact information for third parties who mediate doctor-patient conflicts. Conclusion Most internet-based media reports did not strictly follow media recommendations from authoritative bodies. Strong efforts are needed to require journalists to increase adherence so risk of violence against doctors is reduced in China. Learning Outcomes Most Chinese internet-based media sources did not appropriately report stories concerning violence against doctors. more...

High value-added utilization of plastic waste has historically been a problem, which has driven researchers to make long-term and unremitting efforts to tackle it. High-performance carbon based solid acid (CSA) was prepared from polyvinyl chloride (PVC) and polyethylene (PE) in different proportions. The small amount of chlorine is still residual on the edge of graphitic carbon sheets after co-carbonization and sulfonation. Strong electronegative –Cl group and the high-density phenolic –OH group, double-adsorption group, are covalently bonded to the edges of the graphitic carbon sheets, contributing to the decrystallization of cellulose to a large extent. Meanwhile, PVC and PE-derived CSAs have significantly higher –SO3H group density than PVC-derived CSA and cellulose-derived CSA. These are obviously beneficial to the improvement of hydrolysis activity, which can be attributed to structural optimization caused by co-carbonization PVC and PE. The CSA with a mixture of 80% proportions has great catalytic activity and repeatability. more...

Carbon based solid acids (CSAs) were prepared from cellulose and lignin at different carbonization temperatures and applied to hydrolysis of cellulose, which is of great significance for the multiple utilization of biomass. The structure and performance of cellulose based solid acids (CCSAs) and lignin based solid acids (LCSAs) were investigated by TG-DTG, XRD, FT-IR, XPS, elemental analysis, titration methods, etc. And immersion enthalpy was introduced into estimating the hydrophilicity of CSAs. The results show that the optimum carbonization temperature varies for raw material, and the optimum carbonization temperatures of cellulose and lignin are 683 and 653 K respectively. The adsorption capacities of CCSAs and LCSAs may not only be related to phenolic OH density, but may also relate to alkyl side chains and aromatic frameworks. Compared with LCSAs, the CCSAs possess higher immersion enthalpy, indicating that the CCSAs are more easily accessible to substrate, which contributes to hydrolysis. The hydrolysis activities of CCSAs are always higher than those of LCSAs, which may be due to a higher –SO3H groups densities and better accessibility between substrate and acid sites for CCSAs. These are determined by a big difference in the chemical composition between cellulose and lignin. more...

A series of carbon-based solid acids (CSAs) were respectively prepared by the different relative proportions of cellulose and lignin to simulate biomass, and employed to hydrolyze cellulose. The influence of relative proportions of cellulose and lignin on mixture-derived CSA (MCSA) has been investigated in detail. Differences in the structure and performance of MCSAs were found to be obvious. The microcrystalline structure parameters, adsorption capability and hydrolysis activity of MCSA present regular variation trend with the increase of cellulose proportions, which can be attributed to the interaction of cellulose and lignin during co-carbonization. When cellulose proportion is 50%, the co-carbonization is at a turning point, the carbon skeleton of MCSA is more flexible and disordered with larger interlamellar spacing and more C O C bond. Meanwhile, MCSA exhibits remarkable adsorption capability, and the hydrolysis activity is comparable to that of cellulose-derived CSA. more...

Background: Improper, unprofessional, or misleading media reports about violence against doctors may provoke copycat incidents. Little is known about the adherence of media reports about violence against doctors to professional journalism recommendations. Methods: We identified ten influential incidents of violence against doctors in China through a systematic strategy and used standardized internet-based search techniques to retrieve media reports about these events. Reports were evaluated independently by trained coders to assess adherence to professional journalism recommendations using a 14-item checklist. Findings: In total, 788 eligible media reports were considered. Of those, 50·5% and 47·3% respectively failed to mention the real and complete names of the writer and editor. Reports improperly mentioned specific details about the time, place, methods, and perpetrators of violence in 42·1%, 36·4%, 45·4% and 54·6% of cases, respectively. Over 80% of reports excluded a suggestion to seek help from professional agencies or mediation by a third party and only 3·8% of reports mentioned the perspectives of all three key informants about an event: doctors, patients, and hospital administrators. Of those that mentioned doctor, patient, and/or hospital administrator perspectives, less than 20% indicated they had obtained the interviewee’s consent to include their perspective. Interpretation: Most reports about violence against doctors in the Chinese media failed to strictly follow reporting recommendations from authoritative media bodies. Efforts are recommended to improve adherence to professional guidelines in media reports about violence against doctors in China, as adherence to those guidelines is likely to reduce future violent events against doctors. Funding Statement: None declared. Declaration of Interests: We have no conflicts of interest to declare. Ethics Approval Statement: This analysis was approved by the ethics committee of Xiangya School of Public Health, Central South University (NO. XYGW-2018-24). more...

High-performance carbon-based solid acid was prepared by a simple method. The effects of carbonization temperature and mixing ratio on the structure and performance of carbon catalysts were explored. The participation of borax increases both –COOH group and –SO3H group densities. In addition, graphitization and specific surface area of the catalyst increase by this co-carbonization method. Higher –COOH group density and aromaticity facilitate the adsorption between catalyst and substrate molecule through hydrogen bonding and CH-π interaction respectively. These improvements of structural significantly increase the hydrolysis activity of the catalyst. more...

Improper, unprofessional, or misleading media reports about violence against medical care providers (typically doctors and nurses) may provoke copycat incidents. To examine whether media reports about violence against medical care providers in China follow professional journalism recommendations, we identified 10 influential incidents of violence against medical care providers in China through a systematic strategy and used standardized internet-based search techniques to retrieve media reports about these events from 2007–2017. Reports were evaluated independently by trained coders to assess adherence to professional journalism recommendations using a 14-item checklist. In total, 788 eligible media reports were considered. Of those, 50.5% and 47.3%, respectively, failed to mention the real and complete names of the writer and editor. Reports improperly mentioned specific details about the time, place, methods, and perpetrators of violence in 42.1%, 36.4%, 45.4%, and 54.6% of cases, respectively. Over 80% of reports excluded a suggestion to seek help from professional agencies or mediation by a third party and only 3.8% of reports mentioned the perspectives of all three key informants about an event: medical care providers, patients, and hospital administrators. Of those that mentioned medical care providers, patient, and/or hospital administrator perspectives, less than 20% indicated they had obtained the interviewee’s consent to include their perspective. We concluded that most reports about violence against medical care providers in the Chinese media failed to strictly follow reporting recommendations from authoritative media bodies. Efforts are recommended to improve adherence to professional guidelines in media reports about violence against medical care providers in China, as adherence to those guidelines is likely to reduce future violent events against medical care providers like doctors and nurses. more...

HVAC is a part of building equipment. The quality of HVAC engineering in buildings is directly related to whether buildings can be directly put into operation. Based on the importance of HVAC construction, we must master the relevant construction technology and analyze the difficulties in the construction, and ensure the overall level of the HVAC construction as far as possible. This article analyzes the difficult points of construction HVAC construction, focuses on the key countermeasures to deal with these problems, and provides a quality assurance for the construction of HVAC projects in China's construction projects. more...

In this article, the Bargmann system related to the spectral problem (∂2+q∂+∂q+r)φ=λφ+λφxis discussed. By the Euler–Lagrange equations and the Legendre transformations, a suitable Jacobi–Ostrogradsky coordinate system is obtained. So the Lax pairs of the aforementioned spectral problem are nonlinearised. A new kind of finite-dimensional Hamilton system is generated. Moreover, the involutive solutions of the evolution equations for the infinite-dimensional soliton system are derived. more...

We report an unusual magnetic ground state in single-crystal, double-perovskite $\mathrm{B}{\mathrm{a}}_{2}\mathrm{YIr}{\mathrm{O}}_{6}$ and Sr-doped $\mathrm{B}{\mathrm{a}}_{2}\mathrm{YIr}{\mathrm{O}}_{6}$ with $\mathrm{I}{\mathrm{r}}^{5+}(5{d}^{4})$ ions. Long-range magnetic order below 1.7 K is confirmed by dc magnetization, ac magnetic susceptibility, and heat-capacity measurements. The observed magnetic order is extraordinarily delicate and cannot be explained in terms of either a low-spin $S=1$ state, or a singlet ${J}_{\mathrm{eff}}=0$ state imposed by the spin-orbit interactions (SOI). Alternatively, the magnetic ground state appears consistent with a SOI that competes with comparable Hund's rule coupling and inherently large electron hopping, which cannot stabilize the singlet ${J}_{\mathrm{eff}}=0$ ground state. However, this picture is controversial, and conflicting magnetic behavior for these materials is reported in both experimental and theoretical studies, which highlights the intricate interplay of interactions that determine the ground state of materials with strong SOI. more...

We synthesized a series of Ho1−xPrxFeO3 and HoFe1−xMnxO3 polycrystalline compounds to study the A-site and B-site substitution effects on the structural and magnetic properties in HoFeO3. For A-site Pr3+ substitution, the spin reorientation temperature increases from 50 K at x=0 to 76 K at x=0.3. This results from that the distortion of the crystal structure and Fe–O octahedron is reduced due to Pr3+ substitution, which thus weakens the Fe3+–Fe3+ interaction. For B-site Mn3+ substitution, the Mn3+ substitution weakens the Fe3+–Fe3+ antiferromagnetic interaction, leading to the significant increase of the spin reorientation temperature and the decrease of the antiferromagnetic transition temperature as Mn3+ content increases. For x=0.45, both the spin reorientation and antiferromagnetic transition temperature draw close to room temperature. Besides, the weak ferromagnetism decreases due to the reduction of the Dzyaloshinsky–Moriya interaction caused by the dilution of Mn3+ ions. more...

GdFeO3 and other rare earth substituted crystals with distorted orthorhombic pervoskite-like structure (space group Pbnm) have attracted much attention due to their remarkable magnetic properties of primary significance for technological applications. In the present work, the floating zone growth of GdFeO3 crystals has been systematically investigated and high quality GdFeO3 crystal was obtained by optimized process. The intrinsic magnetic properties of GdFeO3 crystal were investigated. GdFeO3 crystal displayed paramagnetic characteristic at low temperature, as temperature increased, a transition from paramagnetism to antiferromagnetism was observed. more...

The perovskite manganite EuMnO3 is known to be a compound with a narrow e g-band width due to small ionic radius of Eu3+ compared to La3+. The Eu1 −x Sr x MnO3 compounds show complex magnetic properties, depending on the Sr concentration x. We have carried out 55Mn spin-echo nuclear magnetic resonance (NMR) measurements on polycrystalline Eu1−x Sr x MnO3 (0 ≤ x≤ 0.5) compounds at 4.2 or 1.4 K in order to clarify the microscopic local magnetic state of the Mn ions. NMR spectra have been observed in the frequency range from ∼250 MHz to ∼400 MHz. For the A-type antiferromagnetic EuMnO3, the resonance frequency is about 260 MHz, which is much lower than that observed for Mn3+ in La1−x Sr x MnO3. For 0.1 ≤ x ≤ 0.4, the resonance lines corresponding to Mn4+ and Mn3+ have been observed at about 315 MHz and 390 MHz, respectively. Furthermore, the spectra originating from Mn2+ have been observed around 590 MHz for 0.1 ≤ x ≤ 0.4. For Eu0.5Sr0.5MnO3, the NMR spectrum spreads widely with several distinct peaks in the frequency range from 250 MHz to 410 MHz, which shows that the compound is in an inhomogeneous state due to competition between the antiferromagnetic and the ferromagnetic states. more...

Mathematical calculation and analysis have an indissoluble bond with sports technique. With the rapid development of high-tech industries, using the computer for data analysis spreads out more and more in the field of sports and also endows with deeper meanings and contents gradually. The analysis and research of sports technique from two aspects of the application: one is by using the pure data analysis software such as SPSS to analyze sport technique data which are obtained from experiments Moreover, the image collection equipment software is used to capture the images of the sports technique’s process, and then different states in sports can be analyzed according to the images which are obtained from the process. Based on widely used of computers, any experimental requirements can be established artificially by using particular calculation software. It’s available to process modular combination which aims at sports technique. Simulation sports technique can be used for different parts in sports performance to obtain the partial experiment data which can make experimental methods stretched. Study sports technique using mathematical software assure the broader prospects of sports technique development. more...

Single crystal bar of Pr 1/2+ y Sr 1/2− y MnO 3 was successfully prepared by the floating zone growth method, which shows evident anisotropic properties, indicating good quality of crystal. Magnetic measurements were performed on several chips taken from the crystal and three kinds of different magnetic behaviors were found at low temperatures for the half doped Pr 1/2+ y Sr 1/2− y MnO 3 system. The results reveal that slight inhomogeneous element distribution of the crystal obtained by floating zone growth method may be inevitable, but even a slight change of Sr ratio does affect the physical properties of the sample ultimately. Therefore, doped rare-earth manganites is a system strongly depends on the ratio of Mn 3+ /Mn 4+ , i.e., the content of the divalent alkaline-earth element. more...

Large PrFeO 3 single crystal 45 mm in length and 6 mm in diameter was successfully grown by the floating zone technique using a four-mirror-image-furnace at 2 mm/h growth rate under flowing air. XRD pattern and X-ray back-reflection Laue photograph indicated good quality of the as-grown PrFeO 3 single crystal and confirmed [110]-orthorhombic orientation along the grown direction. Fe/Pr ratio fluctuates a little in different zones and has a slight Fe deficiency in the sediments. The evident magnetic anisotropy was observed by comparing the magnetization with H ⊥(110) and H (110), and confirmed the good quality of the as-grown crystal. Pr 3+ moments align from the paramagnetic state into the antiferromagnetic state below 7.6 K. more...

A single crystal of FeSb 2 about 5 mm in diameter and 10 mm in length with a tapering spire was grown by the gradient freeze technique combining the Bridgman technique and flux method using Sb-rich melts in sealed quartz ampoules. X-ray powder diffraction pattern of single crystal FeSb 2 indicates that it is a single phase marcasite structure. Clear Laue spots and scanning electron microscopy photographs indicate good quality and uniform of the FeSb 2 single crystal. Magnetic susceptibility of FeSb 2 along b -axis does not show the diamagnetic to paramagnetic crossover, indicating the intrinsic susceptibility of FeSb 2 determined on large single crystals differs from that of the smaller samples prepared by other techniques. The new method of gradient freeze is of great significance for the single crystal growth of FeSb 2 like materials with a peritectic point. more...

The orthorhombic perovskite SrIrO3 is a semimetal, an intriguing exception in iridates where the strong spin-orbit interaction coupled with electron correlations tends to impose a novel insulating state. We report results of our investigation of bulk single-crystal Sr0.94Ir0.78O2.68 or Ir-deficient, orthorhombic perovskite SrIrO3. It retains the same crystal structure as stoichiometric SrIrO3 but exhibits a sharp, simultaneous antiferromagnetic (AFM) and metal-insulator (MI) transition at 185 K. Above it, the basal-plane resistivity features an extended regime of almost linear-temperature dependence up to 800 K but the strong electronic anisotropy renders an insulating behavior in the out-of-plane resistivity. The Hall resistivity undergoes an abrupt sign change and grows below 40 K, which along with the Sommerfeld constant of 20 mJ/mole K2 suggests a multiband effect. All results including our first-principles calculations underscore a delicacy of the metallic state in SrIrO3 that is in close proximity to an AFM insulating state. The contrasting ground states in isostructural Sr0.94Ir0.78O2.68 and SrIrO3 illustrate a critical role of even slight lattice distortions in rebalancing the ground state in the iridates. Finally, the observed simultaneous AFM and MI transitions reveal a direct correlation between the magnetic transition and formation of a charge gap in the iridate, which is conspicuously absent in Sr2IrO4. more...

Hexagonal $\mathrm{BaIr}{\mathrm{O}}_{3}$ is a magnetic insulator driven by the spin-orbit interaction (SOI), whereas $\mathrm{BaRu}{\mathrm{O}}_{3}$ is an enhanced paramagnetic metal. Our investigation of structural, magnetic, transport, and thermal properties reveals that substitution of $\mathrm{R}{\mathrm{u}}^{4+} (4{d}^{4})$ ions for $\mathrm{I}{\mathrm{r}}^{4+} (5{d}^{5})$ ions in $\mathrm{BaIr}{\mathrm{O}}_{3}$ reduces the magnitudes of the SOI and a monoclinic structural distortion and rebalances the competition between the SOI and the lattice degrees of freedom to render an evolution from a magnetic insulting state to a robust metallic state. The central findings of this paper are as follows: (1) light Ru doping $(0lx\ensuremath{\le}0.15)$ prompts simultaneous, precipitous drops in both the magnetic ordering temperature ${T}_{\mathrm{N}}$ and the electrical resistivity, and (2) heavier Ru doping $(0.41\ensuremath{\le}x\ensuremath{\le}0.9)$ induces a robust metallic state without any long-range magnetic order. All results suggest a critical role of the lattice degrees of freedom in determining the ground state in the heavy transition-metal oxides. more...

The magnetic properties of polycrystalline Yb1−x Pr x FeO3 (0≤x≤0.9) are systematically investigated. A cusp in the zero-field-cooled dc magnetization and a frequency-dependent peak in the ac susceptibility reveal the glassy behaviors in this system. Interestingly, for YbFeO3, the freezing temperature T f is just in the narrow spin-reorientation region of single-crystal YbFeO3 reported previously. The frequency-dependent peak in the real part of the ac susceptibility can be described by critical slowing down of spin dynamics. The fit to this critical slowing down law yields the values τ 0=2.79×10−7 s and zv=2.61. The value of τ 0 is in good agreement with values found in cluster-glass systems. Anomalous thermal hysteresis in the field-cooled magnetization is found in all samples, with a crossover point between the field-cooled cooling and field-cooled warming curves. These anomalous thermal hysteresis behaviors are explained by the competing interaction between the iron-ion subsystem and rare-earth-ion subsystem. more...

Magnetocaloric properties of HoFeO 3 single crystal are investigated along the direction [100]. Magnetic field dependent magnetization isotherms at different temperatures undergo a metamagnetic transition, entropy change as large as 19.2 J/kg K and 15.8 J/kg K are obtained at 7 T in the vicinity of antiferromagnetic ordering temperature of Ho 3+ and the metamagnetic transition, respectively. The coupling of Ho and Fe spins generates the compensation behavior at 6.5 K, separating the two large magnetic entropy change. Its refrigeration capacity (RC) value, as high as 220 J/kg, is appreciable and can be considered as a promising magnetic refrigerant. New evidence for spin reorientation of Fe 3+ in HoFeO 3 is also provided by the change of magnetic entropy. more...

YFeO $_{\boldsymbol 3}$ and other rare earth substituted crystals with distorted orthorhombic pervoskite-like structure (space group, Pbnm) have attracted much attention due to their remarkable magnetic properties of primary significance for technological applications. In the present work, the floating zone growth of YFeO $_{\boldsymbol 3}$ crystals has been systematically investigated and high quality YFeO $_{\boldsymbol 3}$ crystal was obtained by optimized process. The magnetic properties of YFeO $_{\boldsymbol 3}$ crystal were investigated, and it indicated the high magneto-optical property in YFeO $_{\boldsymbol 3}$ crystals with specific orientation due to its anisotropy. YFeO $_{\boldsymbol 3}$ crystals display superior performance in the application magneto-optical current sensors and fast latching optical switches. more...

Structural and magnetic properties of the polycrystalline Y b1−xPrxFeO3 ( 0 ≤ x 1 ) prepared via conventional solid state reaction have been investigated. Raman spectroscopy reveals the corresponding frequencies of most bands shift gradually to lower wavenumber with increasing x due to the inflation of unit-cell after doping Pr ions. The bifurcation between zero field cooled (ZFC) and field cooled (FC) magnetization curves and a cusp in the ZFC curve at low temperature indicate glassy behavior. The cusp in the ZFC magnetization curve is just in the spin reorientation temperature range. It increases and broadens with the doping level x . Magnetic hysteresis loops at various temperatures for typical samples are analyzed. The existence of hysteresis loops and unsaturated magnetization at high field suggest weak ferromagnetism. For Pr doped samples, the weak ferromagnetism nature enhances greatly. more...

The transport properties in the nominal composition Fe(Se1−xSbx)0.92 (x = 0, 0.05, 0.1, 0.2) system were studied. An abnormality was found on the resistivity curve which was ascribed to the structural transition. It was found that doping with Sb could change the transition temperature of structure transition Ts, while at the same time the change of superconducting transition temperature shows the same tendency. This may suggest that the structural transition and superconductivity has an internal relationship in the iron-based superconductors. Furthermore, two transport behaviors were found up and below structure transition like been reported in cuprates, organics, and 122-phase iron-based superconductors. This might be due to the magnetic order. At last, an insulator–metal transition was found at high temperature, suggesting a strong electron–phonon coupling in this system. more...

The rare-earth orthoferrites RFeO3 (R, rare-earth element) crystallize in an orthorhombic distorted perovskite structure. RFeO3 compounds exhibit interesting physical and chemical properties because of their ionic and electronic defects. Polycrystalline nano-sized RFeO3 powders were synthesized by the sol–gel combustion method. X-ray powder diffraction indicated that nanocrystalline powders were single ReFeO3 phase, which are agglomerated with average crystallite size of 60–90 nm estimated with the Scherrer’s equation. Magnetic measurements were carried out using a superconducting quantum interference device magnetometer. The influence on hysteresis curve of electronic structure of rare-earth element was investigated for R = Y, La and Nd. Varied magnetic behaviors were observed in these compounds, which are believed to be associated with the different interactions of Fe and rare earths. more...

The HoFeO 3 single crystal was successfully grown by the floating zone technique using a four-mirror-image-furnace under flowing air. Magnetic properties of HoFeO 3 single crystal were studied over a wide temperature range. Magnetic measurements under different magnetic fields found that the spin reorientation transition in the crystal is well described by the earlier proposed theory with no fitting parameters. Specific heat of HoFeO 3 single crystal was measured from 2 to 300 K under zero magnetic field. Schottky anomaly appeared between 2 and 5 K due to the Ho 3+ spin ordering, and the anomaly of specific heat due to Fe 3+ spin reorientation between 50 and 58 K was observed. more...