中国物理B ›› 2005, Vol. 14 ›› Issue (5): 1051-1054.doi: 10.1088/1009-1963/14/5/035

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Preisach analysis of (La0.2Nd0.8)0.67Pb0.33MnO3

曹先胜1, 肖春涛2, WilliamsGywn3, RoshkoRoy3   

  1. (1)Material department,The second northwest university for nationalities,ningxia750021, P. R. China; (2)Physics Department, Lanzhou University, Lanzhou 730000, P. R. China; (3)Department of Physics and Astronomy, University of Manitoba, R3T 2N2, Canada
  • 收稿日期:2004-11-25 修回日期:2004-12-21 出版日期:2005-05-19 发布日期:2005-05-19

Preisach analysis of (La0.2Nd0.8)0.67Pb0.33MnO3

Cao Xian-Sheng (曹先胜)a, Xiao Chun-Tao (肖春涛)b, Gywn Williamsc, Roy Roshkoc   

  1. a Material department,The second northwest university for nationalities, Ningxia 750021, China; b Physics Department, Lanzhou University, Lanzhou 730000,  China; c Department of Physics and Astronomy, University of Manitoba, R3T 2N2, Canada
  • Received:2004-11-25 Revised:2004-12-21 Online:2005-05-19 Published:2005-05-19

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摘要： The perovskite (La0.2Nd0.8)0.67Pb0.33MnO3 (LNPMO) with a Curie temperature TC=220K has been characterized by measuring the zero field cooled (ZFC) and field cooled (FC) moments over wide range of temperature 2K

关键词: Preisach model, hysteresis loop, magnetization

Abstract: The perovskite (La0.2Nd0.8)0.67Pb0.33MnO3 (LNPMO) with a Curie temperature TC=220K has been characterized by measuring the zero field cooled (ZFC) and field cooled (FC) moments over wide range of temperature 2K < T < 290K in an applied field of Ha = 3978.87 A/m, and also by the major hysteresis loop over the field range Ha $\leq$1061kA/m at T=10K. The data analysed within the framework of a generalized Preisach model, which includes thermal fluctuations, critical effects, and a temperature-dependent distribution of free energy barriers. The analysis shows that the response function of LNPMO is dominated by the growth of the anisotropy barriers.

Key words: Preisach model, hysteresis loop, magnetization

中图分类号: 

  • 7540M