摘要
通过电弧熔炼的方法制备了Mn_(50)Ni_(41-x)Fe_xSn_9合金(x=0,2,4)。采用X射线衍射、综合物性测试系统、振动样品磁强计对合金的晶体结构、相变、磁热效应和交换偏置效应进行了研究。结果表明,随着Fe含量的增加,马氏体转变温度逐渐降低,马氏体居里温度逐渐增加。Fe的加入使材料马氏体相变附近的磁化强度的变化增加,从而使其具有较大的磁热效应。另外,Fe的加入使材料的交换偏置场逐渐降低,这可以用Fe掺杂导致的铁磁交换作用的增强来解释。
Mn50 Ni41-x FexSn9 （x = 0,2,4）alloys were prepared by arc melting method. Their crystal structure, phase transitions, magnetocaloric effect, and exchange bias were investigated by X-ray diffraction, physical property measurement system, and vibrating sample magnetometer. The results show that with the increase of Fe content, the martensitic transformation temperature decreases gradually, while Curie temperature of the martensitic phase increases.The addition of Fe leads to the increase in the magnetization change across the martensitic transformation,which gives rise to relatively large magnetocaloric effect. Furthermore, the exchange bias field decreases with the increasing of Fe concentration,which is ascribed to the fact that Fe addition can enhance the ferromagnetic interaction in Mn50 Ni41-x Fex an9 alloys.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2017年第1期1249-1252,共4页
Journal of Functional Materials
基金
国家自然科学基金资助项目(51371004)
关键词
铁磁形状记忆合金
马氏体相变
磁热效应
交换偏置效应
ferromagnetic shape memory alloy
martensitic transformation
magnetocaloric effect
exchange bias
作者简介
朱瑞（1981-），男，南京人，在读硕士，师承濮林副教授，主要从事纳米磁性材料研究。
通讯作者：韩志达，E-mail：han@cslg．cn
通讯作者：濮林
