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

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

中国物理B ›› 2004, Vol. 13 ›› Issue (5): 783-788.doi: 10.1088/1009-1963/13/5/036

• • 上一篇

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

张福昌, 陈卫然, 龚伟志, 许波, 邱祥冈, 赵柏儒

National Laboratory for Superconductivity, Institute of Physics & Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China

收稿日期:2003-12-12 修回日期:2004-03-18 出版日期:2004-05-06 发布日期:2005-07-06
基金资助:
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).

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

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)

National Laboratory for Superconductivity, Institute of Physics & Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China

Received:2003-12-12 Revised:2004-03-18 Online:2004-05-06 Published:2005-07-06
Supported by:
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).

摘要/Abstract

摘要： The magnetism and magnetoresistance (MR) in a series of oxygen-deficient La_{2/3}Ca_{1/3}MnO_{3-δ} (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.

关键词: manganites, oxygen deficiency, spin glass, positive magnetoresistance

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.

Key words: manganites, oxygen deficiency, spin glass, positive magnetoresistance

中图分类号: (Galvanomagnetic and other magnetotransport effects)

73.50.Jt

75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)

张福昌, 陈卫然, 龚伟志, 许波, 邱祥冈, 赵柏儒. Spin-glass-like behaviour and positive magnetoresistance in oxygen deficient La_2/3Ca_1/3MnO_3-δ thin films[J]. 中国物理B, 2004, 13(5): 783-788.

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[J]. Chinese Physics, 2004, 13(5): 783-788.

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

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

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

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-δ thin films

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