We studied the composition dependence of the structural and magnetic properties of Co-doped Ni-Mn-Ga alloys around the Mn-rich composition Ni50Mn30Ga20. By varying the Co and Mn content we have been able to tune the critical temperatures. In particular, in a suitable composition range, the Curie temperature of martensite is lower than Curie temperature of austenite and lower than martensitic transformation temperature, giving rise to a paramagnetic gap between magnetically ordered martensite and austenite and to the occurrence of a reverse magnetostructural transformation.
机构:Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
Zhang, Chengliang
Wang, Dunhui
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Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R ChinaNanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
Wang, Dunhui
Cao, Qingqi
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机构:Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
Cao, Qingqi
Ma, Shengcan
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机构:Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
Ma, Shengcan
Xuan, Haicheng
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机构:Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
Xuan, Haicheng
Du, Youwei
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机构:Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
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Key Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang UniversityKey Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang University
王敬民
蒋成保
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Key Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang UniversityKey Laboratory of Aerospace Materials and Performance (Ministry of Education),School of Materials Science and Engineering,Beihang University