Preparation and Magneto-Structural Investigation of Nanocrystalline CoMn-Based Heusler Alloy Glass-Coated Microwires

被引:17
作者
Salaheldeen, Mohamed [1 ,2 ,3 ,4 ]
Talaat, Ahmed [1 ,2 ,4 ]
Ipatov, Mihail [1 ,2 ,4 ]
Zhukova, Valentina [1 ,2 ,4 ]
Zhukov, Arcady [1 ,2 ,4 ,5 ]
机构
[1] Univ Basque Country, Fac Quim, Dept Polimeros & Mat Avanzados, UPV EHU, San Sebastian 20018, Spain
[2] Univ Basque Country, Dept Fis Aplicada, UPV EHU, EIG, San Sebastian 20018, Spain
[3] Sohag Univ, Fac Sci, Phys Dept, Sohag 82524, Egypt
[4] Univ Basque Country, EHU Quantum Ctr, UPV EHU, Leioa 48940, Spain
[5] Basque Fdn Sci, Ikerbasque, Bilbao 48011, Spain
基金
欧盟地平线“2020”;
关键词
Co2MnSi Heusler alloys; magnetic properties; glass-coated microwires; blocking temperature; thermal stability; spintronic; MAGNETIC-PROPERTIES; STRESS; SI;
D O I
10.3390/pr10112248
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this work, we have successfully fabricated nanocrystalline Co2MnSi Heusler alloy glass-coated microwires with a metallic nucleus diameter (dnuclei) 10.2 +/- 0.1 mu m and total diameter 22.2 +/- 0.1 mu m by the Taylor-Ulitovsky technique for the first time. Magnetic and structural investigations have been performed to clarify the basic magneto-structural properties of the Co2MnSi glass-coated microwires. XRD showed a well-defined crystalline structure with a lattice parameter a = 5.62 angstrom. The room temperature magnetic behavior showed a strong in-plane magnetocrystalline anisotropy parallel to the microwire axis. The M-H loops showed unique thermal stability with temperature where the coercivity (Hc) and normalized magnetic remanence exhibited roughly stable tendency with temperature. Moreover, quite soft magnetic behavior has been observed with values of coercivity of the order of Hc = 7 +/- 2 Oe. Zero field cooling and field cooling (ZFC-FC) magnetization curves displayed notable irreversible magnetic dependence, where a blocking temperature (TB = 150 K) has been observed. The internal stresses generated during the fabrication process induced a different magnetic phase and is responsible for the irreversibility behavior. Moreover, high Curie temperature has been reported (Tc approximate to 985 K) with unique magnetic behavior at a wide range of temperature and magnetic fields, making it a promising candidate in magnetic sensing and spintronic applications.
引用
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页数:12
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