中国物理B ›› 2002, Vol. 11 ›› Issue (8): 827-833.doi: 10.1088/1009-1963/11/8/315

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

姜恩永1, 白海力1, 侯登录2   

  1. (1)Department of Applied Physics, Tianjin University, Tianjin 300072, China; (2)Department of Applied Physics, Tianjin University, Tianjin 300072, China; Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
  • 收稿日期:2001-12-14 修回日期:2002-03-25 出版日期:2002-08-12 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50072015, 50172033).

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

Hou Deng-Lu (侯登录)ab, Jiang En-Yong (姜恩永)a, Bai Hai-Li (白海力)a   

  1. a Department of Applied Physics, Tianjin University, Tianjin 300072, China; b Department of Physics, Hebei Normal University, Shijiazhuang 050016, China
  • Received:2001-12-14 Revised:2002-03-25 Online:2002-08-12 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50072015, 50172033).

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摘要： Zero-field-cooled (ZFC) magnetization, field-cooled (FC) magnetization, ac magnetic susceptibility and major hysteresis loops of itinerant ferromagnet SrRuO3 have been measured at magnetic ordering temperatures ranging from 5 to 160 K. An empirical model is proposed to calculate the measured ZFC magnetization. The result indicates that the calculated ZFC magnetization compares well with the measured one. Based on the generalized Preisach model, both the ZFC and FC curves are reproduced by numerical simulations. The critical temperature and critical exponents are determined by measuring the ac magnetic susceptibility in different bias magnetic fields at temperatures in the vicinity of the point of phase transition.

Abstract: Zero-field-cooled (ZFC) magnetization, field-cooled (FC) magnetization, ac magnetic susceptibility and major hysteresis loops of itinerant ferromagnet SrRuO3 have been measured at magnetic ordering temperatures ranging from 5 to 160 K. An empirical model is proposed to calculate the measured ZFC magnetization. The result indicates that the calculated ZFC magnetization compares well with the measured one. Based on the generalized Preisach model, both the ZFC and FC curves are reproduced by numerical simulations. The critical temperature and critical exponents are determined by measuring the ac magnetic susceptibility in different bias magnetic fields at temperatures in the vicinity of the point of phase transition.

Key words: zero-field-cooled magnetization, field-cooled magnetization, magnetic susceptibility, hysteresis loop

中图分类号:  (Magnetization curves, hysteresis, Barkhausen and related effects)

  • 75.60.Ej
75.30.Cr (Saturation moments and magnetic susceptibilities) 75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)) 75.10.Lp (Band and itinerant models) 75.30.Kz (Magnetic phase boundaries (including classical and quantum magnetic transitions, metamagnetism, etc.))