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

• Published in: Journal of magnetism and magnetic materials Vol. 453; pp. 96 - 100
• Main Authors: Galdun, L., Ryba, T., Prida, V.M., Zhukova, V., Zhukov, A., Diko, P., Kavečanský, V., Vargova, Z., Varga, R.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.05.2018; Elsevier BV
• Subjects: Alloys; Anisotropy; Crystallography; Curie temperature; Electric wire; Heusler alloy; Heusler alloys; Intermetallic phases; Iron silicide; Magnetic anisotropy; Magnetism; Microwire; Single crystal; Single crystals; Structural analysis; Temperature; Heusler alloy; Single crystal; Microwire
• ISSN: 0304-8853; 1873-4766
• DOI: 10.1016/j.jmmm.2018.01.021

•Large scale production of monocrystalline Heusler micro-wire is reported.•Such a wire is characterized by well oriented anisotropy.•Half-metallic behaviour is observed in the low temperature range. Large scale production of single crystalline phase of Heusler Co2FeSi alloy microwire is reported. The long microwire (∼1 km) with the metallic nucleus diameter of about 2 µm is characterized by well oriented monocrystalline structure (B2 phase, with the lattice parameter a = 5.615 Å). 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.