La0.7Sr0.3MnO3磁性的Preisach模拟

La_0.7Sr_0.3MnO₃磁性的Preisach模拟

基金项目:

国家自然科学基金(50371034)

兰州交通大学光电技术与智能控制教育部重点实验室开放课题(K04113)资助

详细信息

1. Key Laboratory of Opto-Electronic and Intelligent Control of Ministry of Education, LanzhouJiaotong University, Lanzhou 730070, China;
2. Key Lab for Magnetism and Magnetic Materials ofthe Ministry of Education, Lanzhou University, Lanzhou 730000, China

摘要: 用溶胶-凝胶法制备了多晶La_0.7Sr_0.3MnO₃块状样品。利用超导量子磁强计测量了样品在不同状态下的场冷却、零场冷却、等温剩磁、热剩磁曲线以及磁滞回线,分析得到了样品的技术磁化参数。用相同的一套参数,利用基于双势阱的Preisach模型再现了样品所有的磁测量曲线,得到了耗散场的大小和分布。
- 类钙钛矿锰氧化物 ;
- 磁性 ;
- Preisach模型
Abstract: The lumpish polycrystalline La_0.7Sr_0.3MnO₃ samples were fabricated by sol-gel method.The temperature dependence of the field cooled moment,the zero field cooled moment,the thermoremanent moment,and the isothermal remanent moment were collected in a fixed external field by SQUID.The numerical simulations clearly replicate all of the experimental data using the same parameters based on the Preisach model.The distribution of the dissipation field is obtained.
- perovskite manganites /
- magnetic properties /
- Preisach model