Fe.sub.2./sub.MnSn Experimental quest for predicted Heusler alloy

0537825 - FZÚ 2021 RIV NL eng J - Článek v odborném periodiku
Kratochvílová, M. - Král, D. - Dušek, Michal - Valenta, J. - Colman, R.H. - Heczko, Oleg - Veis, M.
Fe₂MnSn Experimental quest for predicted Heusler alloy.
Journal of Magnetism and Magnetic Materials. Roč. 501, May (2020), s. 1-5, č. článku 166426. ISSN 0304-8853. E-ISSN 1873-4766
Institucionální podpora: RVO:68378271
Klíčová slova: Fe₂MnSn * hexagonal structure * ferromagnet * MOKE
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.993, rok: 2020
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.jmmm.2020.166426

Fe2MnSn compound was prepared in the form of polycrystalline ingot by arc-melting. In contrast to the theoretical predictions of stable tetragonal Heusler compound, the material crystallizes in a hexagonal DO19 crystal structure and orders ferromagnetically below Tc = 586(10) K that is only about half of the calculated value of 1012 K. Magnetic moment 5.87 μB at 10 K is less or about in line with various theoretical predictions. However, electrical resistivity and optical studies reveal no signs of half-metallic behavior predicted theoretically. The change in the slope of the MOKE spectra below 1.5 eV suggests the main influence of a low energy inter-band transition which points to the loss of half-metallicity in agreement with resistivity and optical measurements.

Trvalý link: http://hdl.handle.net/11104/0315660