Monocrystalline Heusler Co2FeSi alloy glass-coated microwires: Fabrication and magneto-structural characterization

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:453

Article

Galdun, L.^1,2  Ryba, T.¹  Prida, V. M.²  Zhukova, V.³  Zhukov, A.³  Diko, P.⁴  Kavecansky, V.⁴  Vargova, Z.⁵  Varga, R.¹ 

[1] UPJS, Fac Sci, Inst Phys, Pk Angelinum 9, Kosice 04154, Slovakia

[2] Univ Oviedo, Dept Fis, Calvo Sotelo S-N, E-33007 Oviedo, Spain

[3] Univ Basque Country, Fac Quim, Dept Fis Mat, San Sebastian 20009, Spain

[4] Slovak Acad Sci, Inst Expt Phys, Watsonova 47, Kosice 04001, Slovakia

[5] UPJS, Fac Sci, Inst Chem, Moyzesova 11, Kosice 04001, Slovakia

关键词: Heusler alloy;    Single crystal;    Microwire;   

DOI  :  10.1016/j.jmmm.2018.01.021

来源: Elsevier

【 摘 要 】

Large scale production of single crystalline phase of Heusler Co2FeSi alloy microwire is reported. The long microwire (similar to 1 km) with the metallic nucleus diameter of about 2 mu m is characterized by well oriented monocrystalline structure (B2 phase, with the lattice parameter a = 5.615 angstrom). Moreover, the crystallographic direction [101] is parallel to the wire's axis along the entire length. Additionally, the wire is characterized by exhibiting a high Curie temperature (Tc > 800 K) and well-defined magnetic anisotropy mainly governed by shape. Electrical resistivity measurement reveals the exponential suppression of the electron-magnon scattering which provides strong evidence on the half-metallic behaviour of this material in the low temperature range. (C) 2018 Elsevier B.V. All rights reserved.

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