Magnetocaloric properties of Ni2Mn1−xCuxGa
Shane StadlerSouthern Illinois University Department of Physics, , Neckers 483A, Carbondale, Illinois 62901Mahmud KhanSouthern Illinois University Department of Physics, , Neckers 483A, Carbondale, Illinois 62901Joseph MitchellSouthern Illinois University Department of Physics, , Neckers 483A, Carbondale, Illinois 62901Naushad AliSouthern Illinois University Department of Physics, , Neckers 483A, Carbondale, Illinois 62901A. M. GomesUniversidade Federal do Rio de Janeiro Instituto de Física, , C. P. 68528, Rio de Janeiro 21941-972, BrazilIgor DubenkoCentro Brasileiro de Pesquisas Físicas , Rua Dr. Xavier Sigaud 150, Rio de Janeiro 22290-180, BrazilArmando Yoshihaki TakeuchiCentro Brasileiro de Pesquisas Físicas , Rua Dr. Xavier Sigaud 150, Rio de Janeiro 22290-180, BrazilA. P. GuimarãesCentro Brasileiro de Pesquisas Físicas , Rua Dr. Xavier Sigaud 150, Rio de Janeiro 22290-180, Brazil
2006en
ABI
Abstract
We present the magnetocaloric properties of the substituted Heusler alloy Ni2Mn1−xCuxGa, which shows a maximum magnetic entropy change of ΔSM≈−64J∕KgK=−532mJ∕cm3K at 308K for a magnetic field change ΔH=5T. The dependence of ΔSM on ΔH is approximately linear and does not reach saturation at 5T. It is demonstrated that the temperature at which ΔSM occurs can be tuned through subtle variations in composition.
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