Colossal Magnetoresistance of Polycrystalline (La0.7Tb0.3)2/3Cal/3MnO3 at Low Drive Field

Chin. Phys. Lett.

1999, Vol. 16

Issue (8): 597-599 DOI:

Original Articles

Colossal Magnetoresistance of Polycrystalline (La_0.7Tb_0.3)_2/3Ca_l/3MnO₃ 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

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WANG Jing-hua, CHEN Ting-yong, WU Jian-hua et al 1999 Chin. Phys. Lett. 16 597-599

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Abstract The magnetic and electric properties of polycrystalline (La_0.7Tb_0.3)_2/3Ca_l/3MnO₃ 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.

Keywords: 75.50.LK 72.15.Gd

Published: 01 August 1999

PACS:	75.50.Lk	(Spin glasses and other random magnets)
	72.15.Gd	(Galvanomagnetic and other magnetotransport effects)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1999/V16/I8/0597

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	WANG Jing-hua
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	ZHAO Bai-ru

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