Synthesis and characterisation of Fe-substituted Ni50Mn25FexGa25-x single crystals-Development of the phase transformations with Fe content
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10444420" target="_blank" >RIV/00216208:11320/22:10444420 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=cBPFc7vc1j" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=cBPFc7vc1j</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jallcom.2022.164543" target="_blank" >10.1016/j.jallcom.2022.164543</a>
Alternative languages
Result language
angličtina
Original language name
Synthesis and characterisation of Fe-substituted Ni50Mn25FexGa25-x single crystals-Development of the phase transformations with Fe content
Original language description
Despite promising initial properties, the industrial applicability of magnetic shape memory alloys of the NiMn-Ga family is distinctly limited by the temperature range it can operate in. Here we investigate the effects of minor substitutions of Fe for Ga on the thermodynamic, structural, and magnetic properties of Ni50Mn25FexGa25-x (3.0 < x < 7.5). Single crystals are essential for most intended applications, the studied compositions were prepared in single crystalline form. With increasing iron content, the melting point of the alloy decreases slightly from 1407(2) to 1394(2) K, while the structural B2'-> L21 ordering transition increases in temperature from 1066(2) to 1082(4) K. Magnetisation measurements find that both the Curie temperature and the martensitic transformation temperature increase approximately linearly with Fe concentration, with Curie temperature increasing from 398(1) to 427(2) K, and martensitic transformation temperature increasing from 274(1) to 372(1) K when going from x = 3.0-7.5. The martensitic transformations above room temperature were confirmed by temperature-dependent single-crystal X-ray diffraction. These observations are compared with polycrystalline materials of the same series and support results of the previous studies. The shrinking gap between Curie and martensitic transformation temperatures, as well as the reduction in the low temperature saturated moment from 3.52(2) to 2.78(3) mu B/f.u. make this substitution less industrially attractive but provide essential structural and property evolution details needed to improve and tune theoretical modelling of this important material family. (C)& nbsp;2022 Elsevier B.V. All rights reserved.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Alloys and Compounds
ISSN
0925-8388
e-ISSN
1873-4669
Volume of the periodical
908
Issue of the periodical within the volume
červenec
Country of publishing house
CH - SWITZERLAND
Number of pages
8
Pages from-to
164543
UT code for WoS article
000793171800002
EID of the result in the Scopus database
2-s2.0-85126905991