| Er(Co1-xMnx)2合金的相变调控和磁热效应优化 |
| |
| 引用本文： | 许家昊,姚杨,汪浩波,韩志达,房勇,钱斌,江学范.Er(Co1-xMnx)2合金的相变调控和磁热效应优化[J].常熟理工学院学报,2020(2):4-6,29. |
| |
| 作者姓名： | 许家昊 姚杨 汪浩波 韩志达 房勇 钱斌 江学范 |
| |
| 作者单位： | 常熟理工学院电子信息工程学院;常熟理工学院江苏省新型功能材料重点建设实验室;中国矿业大学材料科学与工程学院 |
| |
| 基金项目： | 国家自然科学基金项目“Ni-Mn基铁磁形状记忆合金的低温相分离和交换偏置效应研究”(51371004)。 |
| |
| 摘 要： | 研究了Mn掺杂对Er(Co1-xMnx)2合金的晶体结构、相变类型和磁热效应的影响.随着Mn含量的增加,合金的晶体结构不变,但是晶格常数逐渐增加,同时居里温度逐渐升高.当x≤0.06时,样品的磁相变为一级相变,表现出较大的磁熵变;而x=0.08时,样品经历铁磁到顺磁的二级相变,磁热效应大大降低.在一级相变和二级相变的临界点x=0.06,样品具有较大的磁熵变,几乎没有磁滞现象.因此,将相变调控到一级相变和二级相变的临界点是优化磁热效应的一种有效方法.
|
| 关 键 词： | Laves合金 磁相变 磁熵变 |
The Optimization of Phase Transition and Magnetocaloric Effect in Er(Co1-xMnx)2 Alloys |
| |
| XU Jiahao,YAO Yang,WANG Haobo,HAN Zhida,FANG Yong,QIAN Bin,JIANG Xuefan.The Optimization of Phase Transition and Magnetocaloric Effect in Er(Co1-xMnx)2 Alloys[J].Journal of Changshu Institute of Technology,2020(2):4-6,29. |
| |
| Authors: | XU Jiahao YAO Yang WANG Haobo HAN Zhida FANG Yong QIAN Bin JIANG Xuefan |
| |
| Institution: | (School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500;Jiangsu Laboratory of Advanced Functional Materials,Changshu Institute of Technology,Changshu 215500;School of Materials Science and Engineering,China University of Mining and Technology,Xuzhou 221116,China) |
| |
| Abstract: | The crystal structure,phase transition,and magnetocaloric effect in Er(Co1-xMnx)2 were investigated systematicaly.With increasing Mn content,the lattice constant increases,and the Curie temperature also increases.For x≤0.06,the alloys undergo a first-order transition,and exhibit giant magnetocaloric effect;while for x=0.08,the aloy undergoes a second-order transition,and its magnetocaloric effect is greatly reduced.In the critical composition point x=0.06,the alloy have large magnetocaloric effect with negligible magnetic hysteresis.These results suggest that tuning the phase transition in the critical point of first-order and second-order transition is an effective way to optimize the magnetocaloric effect. |
| |
| Keywords: | Laves alloys magnetic transition magnetic entropy change |
| 本文献已被 CNKI 维普 等数据库收录！ |
|
