非晶Fe82Si5B13合金的磁导率驰豫

在0—300℃范围内考查了非晶Fe₈₂Si₅B₁₃合金的磁导率等温弛豫动力学行为,给出了等时弛豫谱,观察到四个弛豫峰。测量表明,总的磁导率弛豫由两种弛豫过程组成,即对于退磁可逆的普通减落和对于退磁不可逆的磁导率连续衰减。计算了弛豫时间和激活能的分布,表明弛豫时间和激活能有宽的分布。普通减落和磁导率衰减过程的最可几激活能分别为1.0eV和1.4eV。对退火的样品,观察到磁导率先是增大而后是衰减的广义cross-over效应。 关键词：

MAGNETIC PERMEABILITY RELAXATION IN AMORPHOUS Fe82Si5B13 ALLOY

The kinetic behavior of the isothermal relaxation of the magnetic permeability has been investigated for the amorphous Fe₈₂Si₅B₁₃ alloy in the range 0-300℃. Four relaxation peaks are observed on the isochronal relaxation spectrum for as-quenched alloy. The overale relaxation usally consists of both the ordinary disaccommodation and the continuous permeability decay, they are reversible and irreversible with respect to demagnetization, respectively. The calculations or the distributions of the relaxation time and the activation energy show that they have a broad distribution. The most probable activation energies for disaccommodation and decay are about 1.0 eV and 1.4 eV, respectively. A cross-over effect in the decay is observed for annealed sample.