Spin polarization in Cu2MnSn Heusler alloy produced by melt-spinning. (June 2017)

• Record Type: Journal Article
• Authors: Obaida, M.; Galdun, L.; Ryba, T.; Komanicky, V.; Saksl, K.; Durisin, M.; Kovac, J.; Haskova, V.; Szabo, P.; Vargova, Z.; Varga, R.
• Is Part Of: Intermetallics. Volume 85(2017)
• Page Start: 139
• Page End: 143
• Publication Date: 2017-06
• Subjects: Heusler alloys -- Spin polarization -- Rapid quenching; Intermetallic compounds -- Metallography -- Periodicals; Metallic glasses -- Periodicals; Composés intermétalliques -- Métallographie -- Périodiques; 669.94
• DOI: 10.1016/j.intermet.2017.02.014
• Languages: English
• ISSNs: 0966-9795

Abstract

Abstract: We report on magnetism, transport and spin polarization characteristics of the melt-spun Cu2 MnSn alloy prepared by the rapid quenching technique. The as- cast ribbons showed a relatively well ordered chemical composition (Cu = 50.4%, Mn = 27.1%, Sn = 22.5%). The structural characterization by using X-ray diffraction shows L21 /B2 crystalline structure with the lattice parameter a = 6.196 Å. The magnetic and transport measurements show a metallic behavior with the Curie temperature of 530 K and reveal anisotropic character with the easy magnetization plane parallel with respect to the ribbon plane. As-cast Cu2 MnSn ribbons show the spin polarization measured by using Andreev reflection technique within the range 68–75%. Highlights: Single phase Cu2 MnSn Heusler alloy with well-defined anisotropy was produced in a single production step. It exhibit high Curie temperature and well defined anisotropy with the easy plane parallel with the ribbon plane. The spin polarization reaches values up to 75% due to strong asymmetry in the minority and majority density of state.