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Nd_(0.5)Sr_(0.5)Mn_(1-x)(Ga_x,Ti_x)O_3体系中的电荷有序与自旋有序 被引量:1

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摘要 通过磁化强度和电子自旋共振测量,研究了Nd0.5Sr0.5Mn1-x(Gax,Tix)O3(0.04≤x≤0.4)体系的磁特性.发现用少量Ti替代Mn就完全破坏了系统的电荷有序(CO)相,并诱导出团簇自旋玻璃相,这显示了一个CO的坍塌和自旋有序(SO)相增强的过程.然而,用Ga替代Mn将导致系统CO相的融化.研究还发现,随着Ga替代的增加,CO相逐渐被抑制,但残留的CO相总是存在;而且在低温区反铁磁(AFM)CO相和铁磁(FM)SO共存.此外,还观察到磁化强度-温度曲线中磁化强度的急剧上升,并把这个反常现象归因于CO区域内从倾斜的AFMSO到FMSO的相变.
出处 《中国科学(G辑)》 CSCD 2007年第2期157-164,共8页
基金 国家重点基础研究发展规划(编号:001CB610604) 国家自然科学基金(批准号:10334090) 浙江省自然科学基金(批准号:Y606128) 浙江省教育厅科研基金(批准号:20061552)资助项目
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参考文献21

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