Magnetocaloric properties of Ni 49.9 Mn 19.6 Cu 5.7 Ga 24.8 single crystal processed by Bridgman method with stationary crucible

Rafał Wróblewski , Krzysztof Sielicki , Marcin Leonowicz

Abstract

Bridgman method with stationary crucible was used to grow NiMnCuGa single crystal. Microstructure observations, as well as XRD pattern, revealed a presence of martensitic structure at room temperature. Crystal structure was determined as a non-modulated tetragonal martensite. The phase transition occurred at 296 K and 290 K on heating and cooling, respectively. Magnetic entropy change (ΔSM) reached a peak value of −9.86 J/kgK at the field of 1520 kA/m. Refrigerant capacity (RC), calculated at FWHM of the ΔSM peak, reached a value of 28.5 J/kg. Directly measured adiabatic temperature change (ΔTad) spread over 51 K range and its maximum value reached 0.23 K at 1520 kA/m field.
Author Rafał Wróblewski (FMSE / DCFM)
Rafał Wróblewski,,
- Division of Construction and Functional Materials
, Krzysztof Sielicki (FMSE / DCFM)
Krzysztof Sielicki,,
- Division of Construction and Functional Materials
, Marcin Leonowicz (FMSE / DCFM)
Marcin Leonowicz,,
- Division of Construction and Functional Materials
Journal seriesMaterials Letters, ISSN 0167-577X, (A 35 pkt)
Issue year2018
Vol218
Pages83-85
Publication size in sheets0.3
Keywords in Polishstruktura krystaliczna, materiały magnetyczne, właściwości cieplne, magnetokaloryki, stopy Heuslera, monokryształ
Keywords in Englishcrystal structure, magnetic materials, thermal properties, magnetocalorics, Heusler alloy, single crystal
DOIDOI:10.1016/j.matlet.2018.01.174
URL https://www.sciencedirect.com/science/article/pii/S0167577X18301927
Languageen angielski
File
MatLett 218 83-85 1May2018.pdf 591.17 KB
Score (nominal)35
ScoreMinisterial score = 35.0, 27-02-2018, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 27-02-2018, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 2.572 (2) - 2016=2.426 (5)
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