Magnetic properties and colossal magnetoresistance of the perovskites La2/3Ca1/3Mn1-xTixO3

被引:39
作者
Li, RW [1 ]
Wang, ZH
Chen, X
Sun, JR
Shen, BG
Yan, CH
机构
[1] Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China
[3] Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China
关键词
D O I
10.1063/1.372462
中图分类号
O59 [应用物理学];
学科分类号
摘要
Structure, magnetic, and transport properties of the compounds La2/3Ca1/3Mn1-xTixO3(0 less than or equal to x less than or equal to 0.3) have been investigated. The substitution of a Ti4+ ion for a Mn4+ ion suppresses the ferromagnetism and metallic conduction significantly. In the case of low doping (x less than or equal to 0.04), Curie temperature T-C decreases linearly with the substitution at a rate of about 31 K for 1% Ti. The magnetic spontaneous state has become a cluster glass state for the sample where x = 0.06. Corresponding to the decrease of T-C, the metal-insulator transition temperature and the peak of magnetoresistance (MR) shift to low temperature, while the resistivity and the maximum of MR increase with increasing Ti concentration. The magnetic dilution should be responsible for the experimental results. (C) 2000 American Institute of Physics. [S0021-8979(00)41608-7].
引用
收藏
页码:5597 / 5599
页数:3
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