烧结SrRuO_3的加场冷却(FC)与零场冷却(ZFC)磁化强度的研究  

Zero-field-cooled and Field-cooled Magnetizations of Sintered SrRuO_3

作　　者：李凤舞[1] 

机构地区：[1]燕山大学继续教育学院,秦皇岛066004

出　　处：《信息记录材料》2005年第3期14-16,30,共4页Information Recording Materials

摘　　要：在5K到磁有序温度范围内,测量了SrRuO3样品在不同外场下的ZFC和FC磁化强度曲线。同时测量了样品在不同温度下的磁滞回线,并由此得到各温度下的矫顽力。通过分析ZFC和FC磁化过程的磁矩状态,提出一个经验公式,借助各温度下的矫顽力来计算或分析ZFC磁化强度。计算得到的ZFC磁矩与实验测量得到ZFC很好地符合。守析结果显示,不同ZFC变化规律起源于FC和矫顽力随温度变化之间的竞争结果。Zero-field-cooled and field-cooled magnetizations and major hysteresis loops of sintered SrRuO3 were measured at magnetic ordering temperatures ranging from 5 to 160K. we obtaided the coercivity at different temperature. An empirical model is proposed to calculate the measured ZFC magnetization . The calculated ZFC magnetization conforms well to the measured one . The results indicate that the different ZFC behaviours are originated from the different temperature dependences of FC magnetization and coercivity.

关 键 词：加场冷却磁化强度(FC) 零场冷却磁化强度(ZFC) 磁滞回线 

分 类 号：O482.54[一般工业技术—材料科学与工程]