Metastable magnetic behavior in La_(0.9)Tb_(0.1)MnO_3  

作　　者：Wei-Bin Liu Ying-Tang Zhang Zi-Yu Chen Li-Zhu Liu Sheng-Tao Li Tao-Tao Ai 

机构地区：[1]Department of Physics,Beijing University of Aeronautics and Astronautics [2]School of Material Science and Engineering,Institute of Functional Material,Shaanxi University of Technology [3]Key Laboratory of Engineering Dielectrics and Its Application,Ministry of Education,Harbin University of Science and Technology [4]State Key Laboratory of Electrical Insulation and Power Equipment,Xi'an Jiaotong University

出　　处：《Rare Metals》2017年第7期596-600,共5页稀有金属（英文版）

基　　金：supported by the Special Program for State Key Laboratory of Electrical Insulation and Power Equipment(No.EIPE11207);the Special Program for State Key Laboratory Breeding Base of Dielectrics Engineering(No.DE2011A01);the Special Program for Education Bureau of Province(No.12JK0953);the National Natural Science Foundation of China(No.51201094)

摘　　要：The linear and nonlinear magnetizations of La0.9Tb0.1MnO3 at low temperatures were reported in de- tail. The temperature dependence of magnetization shows peaks at 50, 100 and 150 K, respectively. When LaMnO3 is Tb-doped, its magnetic structure exhibits a canted an- tiparallel spin order. This is different from classical antiferromagnetic （AFM） in which the relaxation behavior takes place at about 150 K. At 50 K, Tb-doped LaMnO3 exhibits canonical spin glass behavior, arising from the competition of exchange and super-exchange between spins. The peak at 100 K shows neither spin glass behavior nor canted AFM behavior. Its peak value increases with frequency increasing, and the transition temperature of the peak shifts to higher temperatures with frequency increasing. The study of aging behavior at 100 K shows a periodical variable metastability, which is ascribed to the competition between ferromagnetic （FM）-, AFM- and sinusoidal-order interactions. This work should shed a light on understanding the complex magnetic structure of the perovskite oxides.The linear and nonlinear magnetizations of La0.9Tb0.1MnO3 at low temperatures were reported in de- tail. The temperature dependence of magnetization shows peaks at 50, 100 and 150 K, respectively. When LaMnO3 is Tb-doped, its magnetic structure exhibits a canted an- tiparallel spin order. This is different from classical antiferromagnetic （AFM） in which the relaxation behavior takes place at about 150 K. At 50 K, Tb-doped LaMnO3 exhibits canonical spin glass behavior, arising from the competition of exchange and super-exchange between spins. The peak at 100 K shows neither spin glass behavior nor canted AFM behavior. Its peak value increases with frequency increasing, and the transition temperature of the peak shifts to higher temperatures with frequency increasing. The study of aging behavior at 100 K shows a periodical variable metastability, which is ascribed to the competition between ferromagnetic （FM）-, AFM- and sinusoidal-order interactions. This work should shed a light on understanding the complex magnetic structure of the perovskite oxides.

关 键 词：La0.9Tb0.1MnO3 Relaxation behavior METASTABILITY 

分 类 号：O611.62[理学—无机化学]