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Electrical transport and magnetic properties of nanostructured La0.67Ca0.33MnO3

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Abstract

We report fabrication of nanostructured La0.67Ca0.33MnO3 (NS-LCMO) by pulsed-laser deposition on the surface of porous Al2O3. The resistance peak temperature (Tp) of the NS-LCMO increases with increasing average thickness of the films, while their Curie temperatures (Tc) remain unchanged. The coercive field of the samples increases with decreasing film thickness and its temperature dependence can be well described by Hc(T)=Hc(0)[1-(T/TB)1/2]. A large magnetoresistance and strong memory effect were observed for the NS-LCMO. The results are discussed in terms of the size effect, Coulomb blockade and magnetic tunneling effect. This work also demonstrates a new way to get nanostructured manganites.

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Authors and Affiliations

  1. Department of Physics, Tsinghua University, Beijing, 100084, P.R. China

    Y.G. Zhao, W. Cai, X.P. Zhang, K. Wang & S.N. Gao

  2. Institute of Physics, Chinese Academy of Sciences, Beijing, 100080, P.R. China

    X.S. Wu & L. Lu

  3. Electron Microscopy Laboratory, Department of Materials Science & Engineering, Tsinghua University, Beijing, 100084, P.R. China

    J. Zhu

Authors
  1. Y.G. Zhao
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  2. W. Cai
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  3. X.S. Wu
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  4. X.P. Zhang
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  5. K. Wang
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  6. S.N. Gao
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  7. L. Lu
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  8. J. Zhu
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Corresponding author

Correspondence to Y.G. Zhao.

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PACS

75.70.Ak; 75.75.+a; 72.80.Ga

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Zhao, Y., Cai, W., Wu, X. et al. Electrical transport and magnetic properties of nanostructured La0.67Ca0.33MnO3. Appl. Phys. A 81, 607–610 (2005). https://doi.org/10.1007/s00339-004-3000-8

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  • DOI: https://doi.org/10.1007/s00339-004-3000-8

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