Colossal Magnetoresistance of Polycrystalline (La0.7 Tb0.3 )2/3 Cal/3 MnO3 at Low Drive Field
WANG Jing-hua, CHEN Ting-yong, WU Jian-hua, DAI Dao-sheng,NIE Jia-cai, ZHAO Bai-ru
Department of Physics, Peking University, Beijing 100871
Colossal Magnetoresistance of Polycrystalline (La0.7 Tb0.3 )2/3 Cal/3 MnO3 at Low Drive Field
WANG Jing-hua;CHEN Ting-yong;WU Jian-hua;DAI Dao-sheng,NIE Jia-cai;ZHAO Bai-ru
Department of Physics, Peking University, Beijing 100871
关键词 ：
75.50.LK ,
72.15.Gd
Abstract ： The magnetic and electric properties of polycrystalline (La0.7 Tb0.3 )2/3 Cal/3 MnO3 were investigated. A spin glass-paramagnetic transition and metal-insulator transition were observed near 45K, and there exists continuous volume change in the range of measured temperature. At 60 K, a large anisotropic magnetostriction and a volume magnetostriction correspond to an isotropic colossal magnetoresistance (CMR) with the magnitude of more than 40% at an applied field of ±0.1 T. Our results demonstrate that the transition is of second-order in nature and CMR could be caused by spin-charge coupling in this compound.
Key words ：
75.50.LK
72.15.Gd
出版日期: 1999-08-01
:
75.50.Lk
(Spin glasses and other random magnets)
72.15.Gd
(Galvanomagnetic and other magnetotransport effects)
引用本文:
WANG Jing-hua;CHEN Ting-yong;WU Jian-hua;DAI Dao-sheng;NIE Jia-cai;ZHAO Bai-ru. Colossal Magnetoresistance of Polycrystalline (La0.7 Tb0.3 )2/3 Cal/3 MnO3 at Low Drive Field[J]. 中国物理快报, 1999, 16(8): 597-599.
0.7 Tb0.3 )2/3 Cal/3 MnO3 at Low Drive Field. Chin. Phys. Lett., 1999, 16(8): 597-599.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y1999/V16/I8/597
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1999, Vol. 16 
