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

作     者：曹先胜 肖春涛 GywnWilliams RoyRoshko 

作者机构：MaterialDepartmentTheSecondNorthwestUniversityforNationalitiesNingxia750021China PhysicsDepartmentLanzhouUniversityLanzhou730000China DepartmentofPhysicsandAstronomyUniversityofManitobaR3T2N2Canada 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2005年第14卷第5期

页      面：1051-1054页

核心收录：

学科分类：0709[理学-地质学] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070901[理学-矿物学、岩石学、矿床学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

主　　题：Preisach model hysteresis loop magnetization 

摘      要：The perovskite (La0.2Nd0.8)0.67Pb0.33MnO3 (LNPMO) with a Curie temperature TC=220K is characterized by measuring the zero field cooled (ZFC) and field cooled (FC) moments over a wide range of temperature 2KT290K in an applied field of Ha=3978.87A/m, and also by the major hysteresis loop over the field range |Ha|≤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.