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La_0.7Sr_0.3MnO₃磁性的Preisach模拟

MODELING THE IRREVERSIBLE RESPONSE OF La_0.7Sr_0.3MnO₃ BASED ONPREISACH MODEL

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【Author】 XI Li1,2,CHI Jun-hong2,GE Shi-hui2,LI Cheng-xian2,LIU Qing-fang1,2(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)

【机构】兰州交通大学光电技术与智能控制教育部重点实验室；兰州大学磁学与磁性材料教育部重点实验室；兰州交通大学光电技术与智能控制教育部重点实验室甘肃兰州730070；甘肃兰州730000；甘肃兰州730070；

【摘要】用溶胶-凝胶法制备了多晶La0.7Sr0.3MnO3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。更多还原

【Abstract】 The lumpish polycrystalline La0.7Sr0.3MnO3 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.更多还原