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Effect of high magnetic field on the two-step martensitic-phase transition in Ni2MnGa

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5 Author(s)
Ma, Yanwei ; Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan ; Awaji, S. ; Watanabe, K. ; Matsumoto, M.
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Using a low-temperature x-ray diffraction apparatus in a high field, a systematic study was performed of the stoichiometric Ni2MnGa alloys in a wide temperature range from 10 K to room temperature and in fields up to 5 T. X-ray diffraction data at different fields clearly show the martensitic-phase transition is a two-step process. It is found that the martensitic-transition temperature Tm increases and the premartensitic-transition temperature Tp decreases with increasing magnetic fields up to 2 T, and then both remain unchanged in fields up to 5 T. © 2000 American Institute of Physics.

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Applied Physics Letters  (Volume:76 ,  Issue: 1 )