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| Ni_(43)Mn_(46-x)T_xSn_(11)(T=Fe,Co,Ni)合金的马氏体相变和磁熵变 | |
| 引用本文： | 韩志达,崔荣静,江学范,王敦辉,都有为.Ni_(43)Mn_(46-x)T_xSn_(11)(T=Fe,Co,Ni)合金的马氏体相变和磁熵变[J].稀有金属,2010,34(1). |
| 作者姓名： | 韩志达 崔荣静 江学范 王敦辉 都有为 |
| 作者单位： | 1. 常熟理工学院物理与电子工程学院,江苏省新型功能材料实验室,江苏,常熟,215500;南京大学物理系,江苏,南京,210093 2. 常熟理工学院化学与材料工程系,江苏,常熟,215500 3. 常熟理工学院物理与电子工程学院,江苏省新型功能材料实验室,江苏,常熟,215500 4. 南京大学物理系,江苏,南京,210093 |
| 基金项目： | 国家自然科学基金面上项目，中国博士后科学基金面上项目，江苏省博士后科研资助，江苏省教育厅高校自然科学基金 |
| 摘 要： | 通过示差扫描量热仪和振动样品磁强计对Ni43Mn46-xTxSn11(T=Fe,Co,Ni)铁磁形状记忆合金的相变、磁性以及磁熵变进行了研究。结果表明,由于价电子浓度的增加,Fe,Co,Ni替代Mn使马氏体转变温度大幅提高。Fe,Ni掺杂对马氏体居里温度(TCM)影响不大,Co则使TCM略有下降;奥氏体居里温度(TCA)对成分比较敏感,Fe,Ni的加入均使TCA略有提高,而Co则会大大提高TCA。由于马氏体相变伴随着磁化强度的突变,Ni43Mn46-xTxSn11合金在马氏体相变附近具有较大的低场磁熵变,对于Ni43Mn41Co5Sn11在室温1T磁场下磁熵变达到了19J.kg-.1K-1。通过调节成分,磁熵变峰值温度可以在199和294K之间调节,同时保持了较大低场磁熵变。 |
| 关 键 词： | 铁磁形状记忆合金 磁熵变 磁制冷 |
Martensitic Transformation and Magnetic Entropy Change in Ni_(43)Mn_(46-x)T_xSn_(11)(T=Fe,Co,Ni) Alloys |
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| Han Zhida,Cui Rongjing,Jiang Xuefan,Wang Dunhui,Du Youwei.Martensitic Transformation and Magnetic Entropy Change in Ni_(43)Mn_(46-x)T_xSn_(11)(T=Fe,Co,Ni) Alloys[J].Chinese Journal of Rare Metals,2010,34(1). | |
| Authors: | Han Zhida Cui Rongjing Jiang Xuefan Wang Dunhui Du Youwei |
| Affiliation: | Han Zhida1,3,Cui Rongjing2,Jiang Xuefan1,Wang Dunhui3,Du Youwei3 (1. Jiangsu Laboratory of Advanced Functional Materials,Department of Physics,Changshu Institute of Technology,Changshu 215500,China,2. Department of Chemistry,3. Department of Physics,Nanjing University,Nanjing 210093,China) |
| Abstract: | The phase transitions,magnetic properties,and magnetic entropy changes in Ni43Mn46-xTxSn11(T=Fe,Co,Ni) ferromagnetic shape memory alloys were studied by using differential scanning calorimeter and vibrating sample magnetometer. The martensitic transformation temperature increased rapidly with the substitution of Mn by Fe,Co,and Ni,which could be attributed to the increase of valence electron concentration. The Curie temperature of martensitic phase showed little dependence on the composition,while the curie... |
| Keywords: | ferromagnetic shape memory alloy magnetic entropy change magnetic refrigeration |
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