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Insulator-metal transition shift related to magnetic polarons in La0.67-xYxCa0.33MnO3

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Abstract:

The magnetic transport properties have been measured for La0.67-xYxCa0.33MnO3(0 ≤ x ≥ 0.14) system. It was found that the transition temperature Tp almost linearly moves to higher temperature as H increases. Electron spin resonance confirms that above T p, there exist ferromagnetic clusters. From the magnetic polaron point of view, the shift of T p vs. H was understood, and it was estimated that the size of the magnetic polaron is of 9.7 ˜ 15.4 Å which is consistent with the magnetic correlation length revealed by the small-angle neutron-scattering technique. The transport properties at temperatures higher than T p conform to the variable-range hopping mechanism.

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Authors and Affiliations

  1. Structure Research Laboratory, Department of Materials Science and Engineering, University of Science and Technology of China, 230026, Hefei, PR, China

    G. Li, S.-J. Feng, F. Liu, Y. Yang, R.-K. Zheng, T. Qian, X.-Y. Guo & X.-G. Li

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  1. G. Li
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  2. S.-J. Feng
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  3. F. Liu
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  4. Y. Yang
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  5. R.-K. Zheng
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  6. T. Qian
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  7. X.-Y. Guo
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  8. X.-G. Li
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Received 27 August 2002 / Received in final form 2 December 2002 Published online 14 March 2003

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Li, G., Feng, SJ., Liu, F. et al. Insulator-metal transition shift related to magnetic polarons in La0.67-xYxCa0.33MnO3 . Eur. Phys. J. B 32, 5–11 (2003). https://doi.org/10.1140/epjb/e2003-00068-8

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  • DOI: https://doi.org/10.1140/epjb/e2003-00068-8

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