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Influence of Gd Doping on Magnetic Behaviour in La0.67Sr0.33CoO3, La0.67Sr0.33MnO3
Liu Ning*1,2, Yan Guoqing1, Tong Wei2
1.Department of Physics, Suzhou College, Suzhou 234000;2.Structure Research Laboratory, University of Science and Technology of China, Hefei 230026
Abstract:
M~T curves and M~H curves of the systems La0.67Sr0.33CoO3, La0.67Sr0.33MnO3 (x=0.00, 0.05, 0.10, 0.20, 0.30, 0.40, 0.50, 0.60, 0.67) were studied by experiments. Experimental results show that the magnetic structure of La0.67-xGdxSr0.33CoO3 system exhibits the cluster glass state with doping Gd increasing. The M~T curves of samples x>0.10 exhibit a peculiar phenomenon that M value rises sharply at low temperature range. The magnetic structure of La0.67-xGdxSr0.33MnO3 system changes from the long rang ferromagnetic order to the cluster glass state, and anti ferromagnetic state. The M~T curves of samples x≥0.50 decline sharply at low temperature range. The different phenomena shown by the two systems come from different coupling function between Gd and Co, Mn and from spin state transition of Co.
Key words:  Condensed matter physics, Magnetic structure, Coupling function, Spin state transition
FundProject:
Gd掺杂对La0.67Sr0.33CoO3、 La0.67Sr0.33MnO3体系磁行为的影响
刘宁*1,2, 严国清1, 童伟2
1.宿州学院物理系,宿州,234000;2.中国科学技术大学结构分析开放实验室,合肥,230026
摘要:
通过实验研究了La0.67-xGdxSr0.33CoO3、La0.67-xGdxSr0.33MnO3(x=0.00、0.05、0.10、0.20、0.30、0.40、0.50、0.60、0.67)体系的磁化强度与温度的关系(M~T)曲线、磁化强度与磁场强度的关系(M~H)曲线.实验结果表明,随Gd掺杂浓度增高,La0.67-xGdxSr0.33CoO3体系的磁结构表现为团簇玻璃态,x>0.10样品的M~T曲线出现了低温区M值急剧上升的奇特现象;La0.67-xGdxSr0.33MnO3体系的磁结构从长程铁
关键词:  凝聚态物理  磁结构  耦合作用  自旋态转变
DOI:10.1088/1674-0068/18/4/589-593
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