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Hysteretic structural changes within five-layered modulated 10M martensite of Ni-Mn-Ga(-Fe)

SYSNO ASEP	0543045
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Hysteretic structural changes within five-layered modulated 10M martensite of Ni-Mn-Ga(-Fe)
Author(s)	Veřtát, Petr (FZU-D)_{RID, ORCID} Seiner, Hanuš (UT-L)_{RID, ORCID} Straka, Ladislav (FZU-D)_ORCID Klicpera, M. (CZ) Sozinov, A. (FI) Fabelo, O. (FR) Heczko, Oleg (FZU-D)_{RID, ORCID}
Number of authors	7
Article number	265404
Source Title	Journal of Physics-Condensed Matter. - : Institute of Physics Publishing - ISSN 0953-8984 Roč. 33, č. 26 (2021)
Number of pages	11 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	ferromagnetic shape memory ; phase transformations ; twinning ; microstructure ; structural modulation
Subject RIV	BM - Solid Matter Physics ; Magnetism
OECD category	Condensed matter physics (including formerly solid state physics, supercond.)
Subject RIV - cooperation	Institute of Thermomechanics - Acoustics
R&D Projects	GA19-09882S GA ČR - Czech Science Foundation (CSF)
	GA20-12624S GA ČR - Czech Science Foundation (CSF)
	EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Method of publishing	Limited access
Institutional support	FZU-D - RVO:68378271 ; UT-L - RVO:61388998
UT WOS	000655762100001
EID SCOPUS	85107163767
DOI	10.1088/1361-648X/abfb8f
Annotation	Modulated structure of Ni–Mn–Ga-based alloys is decisive in their magnetic shape memory(MSM) functionality. However, the precise nature of their five-layered modulated 10Mmartensite is still an open question. We used x-ray and neutron diffraction experiments onsingle crystals to investigate structural changes within 10M-modulated martensite of theNi50Mn27Ga22Fe1MSM alloy. The modulation vector gradually increases upon cooling fromcommensurateq=(2/5)g110,whereg110is the reciprocal lattice vector, to incommensuratewithqup to pseudo-commensurateq=(3/7)g110. Upon heating, reverse changes areobserved with a thermal hysteresis of≈60 K. The same hysteretic behaviour was detected inthe electrical resistivity and the effective elastic modulus. Scanning electron microscopyshowed that the changes are accompanied by the refinement of thea/blaminate. Theseobservations indicate that the commensurate state is a metastable form of 10M martensite.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2022
Electronic address	https://doi.org/10.1088/1361-648X/abfb8f

Number of the records: 1