Effect of Magnetic Interaction on Thermally Activated Reversal in a Magnet With a Distribution of Energy Barriers

摘要：

The time dependence of magnetization is usually expressed as M(t)=M0-Slnt see Proc. Phys. Soc. 62, 562 (1949) for magnetic viscosity experiments. Considering magnetic interaction during the thermal activation process, a form as M(t)=M0-Sln(t+t0) is deduced. The dipolar interaction and exchange coupling in a magnet can lead to positive and nonpositive t0, respectively. In the experiments of the magnetic viscosity for nanocrystalline Pr2Fe14B ribbons, the existence of positive t0 is confirmed.

关键词： magnetization dipolar interaction energy barrier

作者: ZHANG Hong-wei ZHANG Shao-ying SUN Ji-rong SHEN Bao-gen Dagmar Goll Helmut Kronm(u)ller

作者单位: State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chi Max-Planck-Institut fur Metallforschung, Heisenbergstrasse 1, Stuttgart 70569, Germany

会议类型: 国际会议

会议名称: 第19届国际稀土永磁及应用研讨会(19th International Workshop on Rare Earth Permanent Magnets & Their Applications)(REPM06)

会议地点: 北京

会议语种:英文

页码: 60-66

在线出版日期: 2006-08-29（万方平台首次上网日期，不代表论文的发表时间）