| Autor: |
Xue Li, Chao Jing, Yongsheng Liu, Jincang Zhang, Kang Deng, Zhongming Ren, Shixun Cao, Guangqiang Jia, Xiaoyong Zhang |
| Rok vydání: |
2005 |
| Předmět: |
|
| DOI: |
10.1016/b978-008044559-5/50127-7 |
| Popis: |
Publisher Summary This chapter investigates the effects of magnetic field and temperature on structure and magnetic properties of BiMn compound. To do so, Bi-wt.6%Mn alloys are fabricated in different fabrication magnetic field H f .. The microstructure shows that MnBi (low temperature phase, LTP) in Bi-wt.6%Mn alloys are all aligned, with the c-axis of the MnBi (LTP) crystal along the fabrication magnetic field H f . H f explicitly improves the magnetic anisotropy. Magnetic measurements indicate that the MnBi (LTP) saturation magnetization Ms and its coercive field H c change with the temperature. Most of all, the temperature of spin-reorientation increases with the increasing H f but decreased with the increase of the measuring magnetic field H m . H f explicitly improves the magnetic anisotropy. The magnetic moment of MnBi gradually deviates from the c-axis at approximately 90K. It is interesting that, under a dc field applied H m parallel to c-axis, the temperature of SRT decreases with the increase of magnetic field, and increases with the increasing H f . |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
