Phase Transitions, Magnetocaloric Effect and Magnetoresistance in Ni-Co-Mn-Sn Ferromagnetic Shape Memory Alloy
Phase Transitions, Magnetocaloric Effect and Magnetoresistance in Ni-Co-Mn-Sn Ferromagnetic Shape Memory Alloy
复制标题
DOI：
10.1143/jjap.49.010211
复制
发表时间：
2010-01-01
影响因子：
1.5
通讯作者：
Du, Youwei
中科院分区：
文献类型：
--
作者：
Han, Zhida;Wang, Dunhui;Du, Youwei
研究了Ni 43 Mn 46-xCoxSn 11（x = 0-5）铁磁形状记忆合金的相变、磁热效应和磁电阻。随着Co含量的增加，马氏体相变温度和奥氏体相变温度迅速升高，而马氏体相变温度略有降低。在Ni_（43）Mn_（41）Co_（55）Sn_（11））中，在294 K时，当磁场为10 kOe时，磁熵变为19.1 J/（kg.K），而在281 K时，当磁场为50 kOe时，磁电阻为-59%.这些有趣的现象与马氏体相变温度附近磁化强度和电阻的突然变化有关。这些结果使得低成本的Ni-Mn-Co-Sn合金在磁制冷和磁传感器方面具有广阔的应用前景。(C)2010日本应用物理学会
The phase transitions, magnetocaloric effect and magnetoresistance in Ni43Mn46-xCoxSn11 (x = 0-5) ferromagnetic shape memory alloys were investigated. With the increase of Co concentration, the temperatures of martensitic transformation and magnetic transition in austenitic phase increase rapidly, while the magnetic transition temperature in martensitic phase shows a small decrease. In Ni43Mn41Co5Sn11, a giant magnetic entropy change of 19.1 J/(kg.K) in the magnetic field of 10 kOe at 294 K, as well as a large magnetoresistance of -59% for the field change of 50 kOe at 281 K, is observed. These interesting phenomena are associated with the sudden changes of magnetization and resistance near the martensitic transition temperature. These results make the low-cost Ni-Mn-Co-Sn have promising application in magnetic refrigeration and magnetic sensor. (C) 2010 The Japan Society of Applied Physics