In-Situ Alignment of MnBi Crystals Induced by High Magnetic Field above Curie Temperature  

作　　者：刘永生 张金仓 任忠鸣 曹世勋 

机构地区：[1]Department of Mathematics and Physics, Shanghai University of Electric Power, Shanghai 200090 [2]Department of Physics, Shanghai University, Shanghai 200444 [3]Department of Materials Science and Engineering, Shanghai University, Shanghai 200444

出　　处：《Chinese Physics Letters》2007年第1期210-213,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 50234020 and 10274049, tile Key Project of Science and Technology Committee of Shanghai under Grant No 06JC14033, and the Education Committee of Shanghai under Grant No 06LZ01I. The authors would like to thank Dr Wang Hui and Mr Zhang Xiao-Yong for useful discussions and their help in the measurement.

摘　　要：Above Curie temperature, MnBi crystals are aligned in situ along the c-axis in a Bi matrix by a high fabrication magnetic field H f of 10 T. Magnetic testing shows a pronounced anisotropy in magnetization in directions normal and parallel to the fabrication field, resulting from the alignment. The successful alignment m v result from the fact that the easy magnetization direction is along the c-axis of MnBi and the high fabrication field of 10 T is large enough to rotate the ）MnBi crystal to this direction even though the temperature is above the Curie temperature.Above Curie temperature, MnBi crystals are aligned in situ along the c-axis in a Bi matrix by a high fabrication magnetic field H f of 10 T. Magnetic testing shows a pronounced anisotropy in magnetization in directions normal and parallel to the fabrication field, resulting from the alignment. The successful alignment m v result from the fact that the easy magnetization direction is along the c-axis of MnBi and the high fabrication field of 10 T is large enough to rotate the ）MnBi crystal to this direction even though the temperature is above the Curie temperature.

分 类 号：O44[理学—电磁学]