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
AbstractBridgman 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.
|Journal series||Materials Letters, ISSN 0167-577X, (A 35 pkt)|
|Publication size in sheets||0.3|
|Keywords in Polish||struktura krystaliczna, materiały magnetyczne, właściwości cieplne, magnetokaloryki, stopy Heuslera, monokryształ|
|Keywords in English||crystal structure, magnetic materials, thermal properties, magnetocalorics, Heusler alloy, single crystal|
|ASJC Classification||; ; ;|
|Score|| = 35.0, 11-03-2019, ArticleFromJournal|
= 35.0, 11-03-2019, ArticleFromJournal
|Publication indicators||: 2017 = 0.887; : 2017 = 2.687 (2) - 2017=2.452 (5)|
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