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
ASJC Classification2210 Mechanical Engineering; 2211 Mechanics of Materials; 3104 Condensed Matter Physics; 2500 General Materials Science
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, 11-03-2019, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 11-03-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.887; WoS Impact Factor: 2017 = 2.687 (2) - 2017=2.452 (5)
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