Back to Search Start Over

Preparation and Magneto-Structural Investigation of High-Ordered (L21 Structure) Co2MnGe Microwires

Authors :
Polímeros y Materiales Avanzados: Física, Química y Tecnología
Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia
Salaheldeen, Mohamed
Wederni, Asma
Ipatov, Mihail
Zhukova Zhukova, Valentina
Zhukov Egorova, Arkady Pavlovich
Polímeros y Materiales Avanzados: Física, Química y Tecnología
Polimero eta Material Aurreratuak: Fisika, Kimika eta Teknologia
Salaheldeen, Mohamed
Wederni, Asma
Ipatov, Mihail
Zhukova Zhukova, Valentina
Zhukov Egorova, Arkady Pavlovich
Publication Year :
2023

Abstract

We used the Taylor–Ulitovsky technique to prepare nanocrystalline Co2MnGe Heusler alloy glass-coated microwires with a metallic nucleus diameter of 18 ± 0.1 µm and a total diameter of 27.2 ± 0.1 µm. Magnetic and structural studies were carried out to determine the fundamental magneto-structural characteristics of Co2MnGe glass-coated microwires. XRD revealed a well-defined nanocrystalline structure with an average grain size of about 63 nm, lattice parameter a = 5.62 and a unique mixture of L21 and B2 phases. The hysteresis loops measured at different temperatures indicated a well-known ferromagnetic behavior for the reduced remanent, where a monotonic increasing in the reduced remanent and saturation magnetization occurs. The coercivity shows anomalous behavior compared to the Co2Mn-based glass-coated microwires. The magnetization curves for field cooling and field heating (FC–FH) demonstrate a considerable dependence on the applied magnetic field, ranging from 50 Oe to 20 kOe. Internal stresses, originated by the production process, resulted in various magnetic phases, which were responsible for the notable difference of FC and FH curves on magnetization dependence versus temperature. Furthermore, the ferromagnetic behavior and expected high Curie temperature, together with high degree of the L21 order, make it a promising candidate for many applications.

Details

Database :
OAIster
Notes :
This research was funded by the Spanish MICIN, under PID2022-141373NB-I00 project, by EU under “INFINITE” (Horizon Europe) project and by the Government of the Basque Country, under PUE_2021_1_0009 and Elkartek (MINERVA and ZE-KONP) projects and by under the scheme of “Ayuda a Grupos Consolidados” (Ref.: IT1670-22). In addition, MS wishes to acknowledge the funding within the Maria Zambrano contract by the Spanish Ministerio de Universidades and European Union–Next Generation EU (“Financiado por la Unión Europea-Next Generation EU”)., English
Publication Type :
Electronic Resource
Accession number :
edsoai.on1390906760
Document Type :
Electronic Resource