Spin-glass like behaviors in La_(1-x)Tb_xMnO_3 perovskite  

作　　者：ZHANG YingTang1,2,3,WANG ChunChang2,4,LIU WeiBin1,WANG Zhong3,LU HuiBin2 & CHEN ZiYu1 1 Department of Physics,Beijing University of Aeronautics and Astronautics,Beijing 100191 2 Institute of Physics & Center for Condensed Matter Physics,Chinese Academy of Sciences,Beijing 100190 3 School of Material Science & Engineering,Shaanxi University of Technology,Hanzhong 723003 4 Institute of Superconducting and Electronic Materials,Wollongong University,Northfield Ave,Gwynneville,NSW 2522,Australia 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2009年第12期1893-1897,共5页中国科学：物理学、力学、天文学（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 10334070 and 50871007);the Natural Science Foundation of Shaanxi University of Technology and Beijing Key Discipline

摘　　要：A series of samples of La1-xTbxMnO3 (0≤x≤0.15) are prepared. The static and dynamic magnetizations of La1-xTbxMnO3 have been investigated. The results indicate that the spins with the short-range order are frozen into random direction at low enough temperatures which leads to the samples exhibiting the spin-glass like behavior. It is considered that the spin-glass like behavior originates from the competition between ferromagnetic double exchange among Mn3+ and Mn2+ and antiferromagnetic superex-change among Mn3+ and Mn3+,as well as Tb3+ and Tb3+.A series of samples of La1-xTbxMnO3 (0≤x≤0.15) are prepared. The static and dynamic magnetizations of La1-xTbxMnO3 have been investigated. The results indicate that the spins with the short-range order are frozen into random direction at low enough temperatures which leads to the samples exhibiting the spin-glass like behavior. It is considered that the spin-glass like behavior originates from the competi-tion between ferromagnetic double exchange among Mn3+ and Mn2+ and antiferromagnetic superex-change among Mn3+ and Mn3+,as well as Tb3+ and Tb3+.

关 键 词：La1-xTbxMnO3 spin-glass-like behavior SHORT-RANGE order 

分 类 号：O482.5[理学—固体物理]