Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni.sub.2./sub.MnGa Heusler alloys under high pressure

Kamarád, Jiří; Albertini, F.; Arnold, Zdeněk; Fabbrici, S.; Kaštil, Jiří

doi:https://dx.doi.org/10.1016/j.actamat.2014.06.011

Number of the records: 1

Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni.sub.2./sub.MnGa Heusler alloys under high pressure

1.

SYSNO ASEP	0435763
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Extraordinary magnetic and structural properties of the off-stoichiometric and the Co-doped Ni₂MnGa Heusler alloys under high pressure
Author(s)	Kamarád, Jiří (FZU-D)_{RID, ORCID} Albertini, F. (IT) Arnold, Zdeněk (FZU-D)_{RID, SAI, ORCID} Fabbrici, S. (IT) Kaštil, Jiří (FZU-D)_{RID, ORCID}
Source Title	Acta Materialia. - : Elsevier - ISSN 1359-6454 Roč. 77, Sep (2014), s. 60-67
Number of pages	8 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	Heusler alloys ; martensitic transformation ; magnetic properties ; high pressure
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GAP204/12/0692 GA ČR - Czech Science Foundation (CSF)
Institutional support	FZU-D - RVO:68378271
UT WOS	000340303200006
DOI	10.1016/j.actamat.2014.06.011
Annotation	To show and to describe a contrast between the magnetic and structural properties of the stoichiometric Ni2MnGa alloy and the off-stoichiometric and the Co-doped Ni–Mn–Ga alloys, we report the effect of high hydrostatic pressure (up to 1.2 GPa) on magnetization and the critical temperatures of structural and magnetic transitions in the off-stoichiometric Ni50−xMn25+x+yGa25−y and the Co-doped Ni50−xCoxMn25+yGa25−y Heusler alloys. A huge decrease in their saturation magnetization MM(5 K) under pressure was observed with an extreme value of pressure parameter d ln MM(5 K)/dP = −56 × 10−3 GPa−1 in the case of the Ni39Co11Mn34Ga16 alloy. The Curie temperature TCA increases under pressure in all the studied alloys. Almost identical values of dTCA/dP = +4.7 ÷ +5.9 K GPa−1 point to a normalized steepness of a dependence of exchange interactions on interatomic distances.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2015

Number of the records: 1