Giant Magnetoresistance in Granular Perovskite La0.8Sr0.2MnO3

Chin. Phys. Lett.

1997, Vol. 14

Issue (3): 229-232 DOI:

Original Articles

Giant Magnetoresistance in Granular Perovskite La_0.8Sr_0.2MnO₃

ZHANG Ning^1,2;DING Wei-ping¹;GUO Zai-bin¹;ZHONG Wei¹;DU Kai-he²;DU You-wei¹

¹National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 ²Key Laboratory of Jiangsu Province for Optic and Electric Techniques, Nanjing Normal University, Nanjing 210024

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ZHANG Ning, DING Wei-ping, GUO Zai-bin et al 1997 Chin. Phys. Lett. 14 229-232

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Abstract The electric and magnetic properties in granular perovskite La_0.8Sr_0.2MnO₃ have been investigated. A giant magnetoresistance (GMR) has been observed at temperatures well below T_C, the Curie temperature, associated with crystal intrinsic magnetic properties. The granular GMR effect is also isotropic but shows some characteristics different from those in the films and crystals of similar perovskites. This suggests an effect of interfacial spin-dependent tunneling in the granular perovskite at temperatures much lower than T_C. In addition, with the reduction of grain size, an evident superparamagnetic behavior has been observed.

Keywords: 81.35.+k 73.40.-e 72.15.Gd

Published: 01 March 1997

PACS:	81.35.+k
	73.40.-e
	72.15.Gd	(Galvanomagnetic and other magnetotransport effects)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1997/V14/I3/0229

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	ZHANG Ning
	DING Wei-ping
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	DU You-wei

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