Constant plane shift model: Structure analysis of martensitic phases in Ni.sub.50./sub.Mn.sub.27./sub.Ga.sub.22./sub.Fe.sub.1./sub. beyond non-modulated building blocks

0572794 - FZÚ 2024 RIV GB eng J - Journal Article
Vinogradova, A. - Sozinov, A. - Straka, Ladislav - Veřtát, Petr - Heczko, Oleg - Zelený, M. - Chulist, R. - Lähderanta, E. - Ullakko, K.
Constant plane shift model: Structure analysis of martensitic phases in Ni₅₀Mn₂₇Ga₂₂Fe₁ beyond non-modulated building blocks.
Acta Materialia. Roč. 255, Aug. (2023), č. článku 119042. ISSN 1359-6454. E-ISSN 1873-2453
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT(CZ) EF18_053/0016627; GA ČR(CZ) GA21-06613S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; OP VVV - Mobility FZU 2(XE) CZ.02.2.69/0.0/0.0/18_053/0016627
Institutional support: RVO:68378271
Keywords : magnetic shape memory * martensite * Ni-Mn-Ga * intermartensitic transformation
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 9.4, year: 2022
Method of publishing: Open access

Martensites of Ni-Mn-Ga-based alloys consist of hierarchical twinning domains spanning from micro- to nanoscale. This affects the diffraction pattern and thus can decrease the accuracy of the determination of the crystal structure. We propose a method to obtain different martensitic phases in Ni-Mn-Ga-Fe alloy with simplified variant microstructures and domain sizes of more than 2 micrometers. The use of simplified variant microstructures allows the influence of nanometer-scale domains on diffraction line position to be circumvented and enabls the comparison of the lattice parameters of non-modulated (NM), five-layered modulated (10M), and seven-layered (14M) phases in the same temperature range due to the large hysteresis of the intermartensitic transformations.
Permanent Link: https://hdl.handle.net/11104/0343356