Volume 96, Number 2, October 2011
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||07 October 2011|
Evidence of magnetic anisotropy and spin-reorientation in the textured MnBi crystal
Department of Physics, Shanghai University of Electric Power - Shanghai 200090, China
2 Department of Physics, Shanghai University - Shanghai 200444, China
3 Department of Materials Science and Engineering, Shanghai University - Shanghai 200444, China
4 Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education - Shanghai 200092, China
Accepted: 5 September 2011
Magnetic anisotropy is investigated systematically for the textured MnBi crystal. The magnetic anisotropy exists in magnetization behaviors, hysteresis loops, and remnant magnetization. An abnormal coercivity field Hc is found in the textured MnBi: Hc perpendicular to the c-axis is larger than that parallel to the c-axis. The mechanism of anisotropy is discussed based on magnetocrystalline anisotropy in MnBi. The behavior of a.c. susceptibility has similar trends with frequency variation, not displaying a spin-disorder characteristic. The MnBi with ferromagnetic order has a higher loss under high frequencies than under low frequencies. Some spin-reorientation evidence in the MnBi is also obtained.
PACS: 75.30.-m – Intrinsic properties of magnetically ordered materials / 75.25.-j – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
© EPLA, 2011
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