Magnetocaloric effect linked to structural and magnetic transitions in Ni–Fe–Ga alloys

In this work, the analysis of the magnetocaloric effect linked to the martensitic transformation (MT) in polycrystalline Ni 53+ x Fe 20− x Ga 27 ( x = 0.5 , 1, 2) ferromagnetic shape memory alloys is reported. Two alloys show a MT between two ferromagnetic phases ( x = 0.5 and 1) and in the third al...

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Published inJournal of magnetism and magnetic materials Vol. 310; no. 2; pp. e999 - e1001
Main Authors Recarte, V., Pérez-Landazábal, J.I., Gómez-Polo, C., Cesari, E., Dutkiewicz, J.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.03.2007
Subjects
Ferromagnetic shape memory alloy
Heusler alloy
Magnetocaloric effect
Martensitic transformation
81.30.Kf
Magnetocaloric effect
Ferromagnetic shape memory alloy
Martensitic transformation
75.30.Sg
75.47.Np
Heusler alloy
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Summary:In this work, the analysis of the magnetocaloric effect linked to the martensitic transformation (MT) in polycrystalline Ni 53+ x Fe 20− x Ga 27 ( x = 0.5 , 1, 2) ferromagnetic shape memory alloys is reported. Two alloys show a MT between two ferromagnetic phases ( x = 0.5 and 1) and in the third alloy ( x = 2 ) the MT occurs in the paramagnetic state. The magnetic fluctuations around the martensitic transformation temperature, T M, that appear above T C in the x = 2 alloy, could induce a value of the magnetocaloric effect (MCE) in paramagnetic state comparable to the values obtained during the MT in the ferromagnetic state.
Bibliography:SourceType-Scholarly Journals-2
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ISSN:0304-8853
DOI:10.1016/j.jmmm.2006.10.1050