Magnetic order in Mn excess Ni-Mn-Ga Heusler alloy single crystal probed by ferromagnetic resonance

0542480 - FZÚ 2022 RIV NL eng J - Journal Article
Kraus, Luděk - Heczko, Oleg
Magnetic order in Mn excess Ni-Mn-Ga Heusler alloy single crystal probed by ferromagnetic resonance.
Journal of Magnetism and Magnetic Materials. Roč. 532, Aug (2021), č. článku 167983. ISSN 0304-8853. E-ISSN 1873-4766
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA19-09882S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : Heusler alloys * magnetic order * ferromagnetic resonance
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.097, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.jmmm.2021.167983

Magnetic order and its changes upon martensitic transition are investigated in non-stochiometric Ni50Mn28Ga22 single crystal exhibiting magnetic shape memory effect by ferromagnetic resonance. The resonance is measured with magnetic field applied in plane along two 〈1 0 0〉 perpendicular directions in the flat rectangular sample. While for one field direction the spectrum can be explained by the standard ferromagnetic resonance, for the other the spectrum suggests the two sublattice model of ferrimagnetic resonance. Magnetic anisotropy of martensite, determined from the resonance fields, well corresponds with the magnetocrystalline anisotropy obtained by the static methods. On transition to the austenite phase magnetic anisotropy disappears while exchange resonance mode derived from the two sublattice model persists.
Permanent Link: http://hdl.handle.net/11104/0319884