SrRuO_3铁磁性能研究

Ferromagnetism Performance of SrRuO_3

测量了烧结SrRuO3的零场冷却和加场冷却磁化强度和交流磁化率。随外加直流偏场的增加,交流磁化率与温度关系曲线向低温方向移动。继续增加直流偏场,一个峰分裂为两个峰,其中低温下的峰继续向低温方向移动,另一个高温处的峰却向高温方向移动。在不同频率下测量零偏场下的交流磁化率,随频率增加峰值减小,但峰的位置并没有像以前报道得那样向高温方向移动。可见,烧结SrRuO3并没有显示自旋玻璃行为,而是普通铁磁体。

Zero-field-cooled (ZFC) and field-cooled(FC) DC magnetization and AC susceptibility of sintered SrRuO_3 were investigated.The results manifested that the peak in susceptibility vs temperature curve shifted to lower temperature when the bias field was intensified ,and the peak broke into two as the field keeping intensifying.One peak still shift to lower temperature and the other shift to higher temperature.Zero bias field susceptibility was measured at different frequencies.The peak value decreased as the increase of frequency,but it did not shift to higher temperature as reported previously.The results suggested that SrRuO_3 was not spin glass,but ferromagnet.