中国物理B ›› 2005, Vol. 14 ›› Issue (9): 1879-1881.doi: 10.1088/1009-1963/14/9/034

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Magnetotransport properties of La0.67Ca0.33MnO3/La0.67Sr0.33MnO3 bilayers

丰家峰1, 黄延红1, 赵见高1, 韩秀峰1, 詹文山1, 赵昆2, 黄康权3   

  1. (1)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China; (2)Beijing National Laboratory for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080, China;Spintronics Laboratory, School of Physics Science and Information Technology, Liaocheng University,Liaocheng 252059, China;In; (3)Department of Physics, The Chinese University of Hong Kong, Hong Kong
  • 收稿日期:2005-03-31 修回日期:2005-04-21 出版日期:2005-09-20 发布日期:2005-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50371102 and 10334070),Hi-Tech Research and Development Program of China (Grant No 2004AA32G090),the Research Foundation of Shandong Provincial Education Department of China

Magnetotransport properties of La0.67Ca0.33MnO3/La0.67Sr0.33MnO3 bilayers

Feng Jia-Feng (丰家峰)a, Zhao Kun (赵昆)abc, Huang Yan-Hong (黄延红)a, Zhao Jian-Gao (赵见高)a, Han Xiu-Feng (韩秀峰)a, Zhan Wen-Shan (詹文山)a, Wong Hong-Kuen (黄康权)d   

  1. a Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China; b Spintronics Laboratory, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China; c Department of Physics, The Chinese University of Hong Kong, Hong KongInternational Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China; d  Department of Physics, The Chinese University of Hong Kong, Hong Kong 
  • Received:2005-03-31 Revised:2005-04-21 Online:2005-09-20 Published:2005-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 50371102 and 10334070),Hi-Tech Research and Development Program of China (Grant No 2004AA32G090),the Research Foundation of Shandong Provincial Education Department of China

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摘要： The perovskite bilayers La0.67Ca0.33MnO3 (LCMO) (100nm) / La0.67Sr0.33MnO3(LSMO) (100 nm) and LSMO (100 nm) / LCMO (100 nm) are fabricated by a facing-target sputtering technique. Their transport and magnetic properties are investigated. It is found that the transport properties between them are different obviously due to distinguishable structures, and the different lattice strains in both films result in the difference of metal-to-insulator transition. Only single-step magnetization loop appears in our bilayers from 5K to 320K, and the coercive force of LSMO/LCMO varies irregularly with a minimum \sim 2387A/m which is lower than that of LCMO and LSMO single layer films. The behaviour is explained by some magnetic coupling.

关键词: manganites, magnetic coupling, bilayer film

Abstract: The perovskite bilayers La0.67Ca0.33MnO3 (LCMO) (100nm) / La0.67Sr0.33MnO3(LSMO) (100 nm) and LSMO (100 nm) / LCMO (100 nm) are fabricated by a facing-target sputtering technique. Their transport and magnetic properties are investigated. It is found that the transport properties between them are different obviously due to distinguishable structures, and the different lattice strains in both films result in the difference of metal-to-insulator transition. Only single-step magnetization loop appears in our bilayers from 5K to 320K, and the coercive force of LSMO/LCMO varies irregularly with a minimum $\sim$ 2387A/m which is lower than that of LCMO and LSMO single layer films. The behaviour is explained by some magnetic coupling.

Key words: manganites, magnetic coupling, bilayer film

中图分类号:  (Magnetic oxides)

  • 75.47.Lx
75.60.Ej (Magnetization curves, hysteresis, Barkhausen and related effects) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures)) 71.30.+h (Metal-insulator transitions and other electronic transitions)