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Field dependence of magnetoresistance in epitaxial single-crystal La2/3Ca1/3MnO3-δ thin film

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Abstract

Epitaxial La2/3Ca1/3MnO3 thin films were prepared on NdGaO3(1lO) substrates by d.c. magnetron sputtering method. The measurements of magnetoresistance ρ(H) upon magnetic field at different temperatures were carried out in the field range of 0–8 T. It is found that ρ(H) obeys the following relations: when the temperature (T) is higher than the Curie temperature\(T_C , \rho (H) = \frac{1}{{\alpha (T) + \beta (T)H^2 }}\) below\(T_C , \rho (H) = \rho _0 (T) + \frac{1}{{A(T) + B(T)exp(H/C(T))}}\) and\(\rho (H) = \frac{1}{{\sigma (T) + \gamma (T)H}}\) whenT is far WowT c. It is suS8ested that the negative magnetoresistive effect is mainly due to enhancement of the magnetoconductance.

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Authors and Affiliations

  1. Institute of Solid State Physics, Chinese Academy of Sciences, 230031, Hefei, China

    Kebin Li, Rongsheng Cheng, Shouguo Wang & Zhixiang Chen

  2. High Magnetic Field Laboratory, Institute of Plasma Physics, Chinese Academy of Sciences, 230031, Hefei, China

    Jun Fang, Zhihe Wang & Xiaowen Cao

  3. Structural Research Laboratory, University of Science and Technology of China, 230026, Hefei, China

    Xiaojun Xu, Jingsheng Zhu & Yuheng Zhang

Authors
  1. Kebin Li
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  2. Rongsheng Cheng
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  3. Shouguo Wang
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  4. Zhixiang Chen
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  5. Jun Fang
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  6. Zhihe Wang
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  7. Xiaowen Cao
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  8. Xiaojun Xu
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  9. Jingsheng Zhu
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  10. Yuheng Zhang
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Additional information

Project supported by the National Natural Science Foundation of China (Grant No. 19504012) and the Chinese Academy of Sciences.

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Li, K., Cheng, R., Wang, S. et al. Field dependence of magnetoresistance in epitaxial single-crystal La2/3Ca1/3MnO3-δ thin film. Sci. China Ser. A-Math. 42, 99–105 (1999). https://doi.org/10.1007/BF02872056

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  • DOI: https://doi.org/10.1007/BF02872056

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