Sr_(1-x)Ca_xRuO_3磁性行为的Preisach模拟  

Preisach Modelling on Magnetic Properties of Sr_(1-x)Ca_xRuO_3

作　　者：侯登录[1] 徐静[1] 赵素英[2] 白云[1] 赵晶[1] 唐贵德[1] 

机构地区：[1]河北师范大学物理学院,河北石家庄050016 [2]河北工业职业技术学院,河北石家庄050091

出　　处：《稀有金属》2004年第1期202-206,共5页Chinese Journal of Rare Metals

基　　金：国家自然基金资助项目 ( 10 0 740 13 )

摘　　要：对 3d过渡元素及其化合物已有了充分的研究 ,但对 4d族化合物的研究却很少 ,其中SrRuO3表现出非常有趣的ZFC/FC磁化强度的变化规律。为深入了解材料磁化的物理本质 ,用改进的Preisach模型对系列样品Sr1 -xCaxRuO3(x =0 .0 ,0 .2 ,0 .6)的各种磁性行为 ,如零场冷却(ZFC)磁化强度、加场冷却 (FC)磁化强度随温度的变化以及不同温度下的磁滞回线等实验结果进行了分析模拟。通过对实验数据拟合得到巴克豪森 (Barkhausen)跳跃谱的相关参数 。The elements and compounds of 3d transitional group have been sufficiently studied, but the study in 4d group is insufficient. The sample SrRuO 3 shows very interesting properties, such as zero field cooled (ZFC) and field cooled (FC) magnetization. An improved Preisach model of simulating magnetic behaviors was applied to the samples Sr 1- x Ca x RuO 3 ( x =0 0, 0.2, 0.6), and standard experimental protocols like ZFC and FC curves of magnetization and various isothermal hysteresis loops can all be simulated by the model. Through the fitting of the experimental data, we can get the correlative parameters of Barkhausen jumps that reflect the physical nature of the magnetization of materials.

关 键 词：PREISACH模型 巴克豪森跳跃 磁滞回线 

分 类 号：O144.2[理学—数学]