Spin-glass-like behaviour and positive magnetoresistance in oxygen deficient La2/3Ca1/3MnO3-$\delta$ thin films

doi:10.1088/1009-1963/13/5/036

Abstract

Abstract The magnetism and magnetoresistance (MR) in a series of oxygen-deficient La$_{2/3}$Ca$_{1/3}$MnO$_{3-\delta}$ (LCMO) thin films have been investigated. Compared with the films with stoichiometric oxygen concentration, the oxygen-deficient LCMO thin films show a spin-glass-like behaviour at low temperatures, and a positive MR effect above the metal－insulator transition temperature. The mechanism of such unusual phenomena is discussed.

Keywords: manganites oxygen deficiency spin glass positive magnetoresistance

Received: 12 December 2003
Revised: 18 March 2004
Accepted manuscript online:

PACS:	73.50.Jt	(Galvanomagnetic and other magnetotransport effects)
	75.70.-i	(Magnetic properties of thin films, surfaces, and interfaces)

Fund: Project supported by the State Key Development Programme of Basic Research of China (Grant No TG1998061406) and the National Natural Science Foundation of China (Grant No 90206019).

Cite this article:

Zhang Fu-Chang (张福昌), Chen Wei-Ran (陈卫然), Gong Wei-Zhi (龚伟志), Xu Bo (许波), Qiu Xiang-Gang (邱祥冈), Zhao Bai-Ru (赵柏儒) Spin-glass-like behaviour and positive magnetoresistance in oxygen deficient La_2/3Ca_1/3MnO_3-$\delta$ thin films 2004 Chinese Physics 13 783

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Spin-glass-like behaviour and positive magnetoresistance in oxygen deficient La2/3Ca1/3MnO3-$\delta$ thin films

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Spin-glass-like behaviour and positive magnetoresistance in oxygen deficient La_2/3Ca_1/3MnO_3-$\delta$ thin films