Magnetostructural transition in NiCuCoMnGa alloys |
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Authors: | Li Pan-Pan Wang Jing-Min and Jiang Cheng-Bao |
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Affiliation: | Key Laboratory of Aerospace Materials and Performance (Ministry of Education), School of Materials Science and Engineering, Beihang University, Beijing 100191, China |
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Abstract: | The effects of the addition of Co on the martensitic transformation and Curie transition temperatures of polycrystalline Ni 46-x Cu 4 Co x Mn 33.5 Ga 16.5 (x = 0, 1, 3, 5) alloys are investigated. An abrupt decrease in the martensitic transformation temperature and an obvious increase in the Curie transition temperature of austenite (T_C~A ) are observed when Co is doped in the NiCuMnGa alloy. As a result, the composition range for obtaining the magnetostructural transition is extended. Furthermore, the effect of a strong magnetic field on the magnetostructural transition is analyzed. This study offers a possible method to extend the composition range for obtaining magnetostructural transition in Heusler alloys. |
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Keywords: | magnetostructural transition Heusler alloys NiCuCoMnGa |
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