Zero-field-cooled and field-cooled magnetizations and magnetic susceptibility of itinerant ferromagnet SrRuO3

• 来源期刊: 中国物理（英文版）
• 学科: 物理学
• 关键词: zero-field-cooled magnetization field-cooled magnetization magnetic sus-ceptibility hysteresis loop
• 年，卷（期）: 2002,（8）
• 页码范围: 827-833
• 页数: 7页
• 分类号: O4
• 语种: 英文

摘要

Zero-field-cooled (ZFC) magnetization, field-cooled (FC) magnetization, ac magnetic susceptibility and majorhysteresis loops of itinerant ferromagnet SrRuO3 have been measured at magnetic ordering temperatures ranging from5 to 160 K. An empirical model is proposed to calculate the measured ZFC magnetization. The result indicates that thecalculated ZFC magnetization compares well with the measured one. Based on the generalized Preisach model, boththe ZFC and FC curves are reproduced by numerical simulations. The critical temperature and critical exponents aredetermined by measuring the ac magnetic susceptibility in different bias magnetic fields at temperatures in the vicinityof the point of phase transition.