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EPR Study of the Local Magnetic Field Distribution over the Bi2Sr2Ca1−x Y x Cu2O8+y Crystal Surface above the Superconducting Transition Temperature

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Abstract

The magnetic field distribution on the surface of the high-Tc superconductor crystals Bi2Sr2Ca1−x Y x Cu2O8+y has been studied in a wide temperature range using electron paramagnetic resonance (EPR) of the surface probe. The changes of the EPR signal broadening and shift with temperature and the probe-sample distance have been investigated. The analysis of obtained data made it possible to conclude that in the large temperature range above the critical temperature, some of the studied crystals are magnetized inhomogeneously. In the samples underdoped with charge carriers, the range is 40 K. Such samples contain inclusions with diamagnetic and paramagnetic magnetization. They are probably formed due to the electron phase separation.

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Acknowledgments

This work has been supported in part by the Russian Foundation for Basic Research and the Academy of Sciences of the Republic of Tatarstan (project no. 13-02-97036), and the Russian Academy of Sciences through the programs P-20 and OF-3.

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Authors and Affiliations

  1. Zavoisky Physical-Technical Institute, 420029, Kazan, Russia

    Y. Talanov & L. Salakhutdinov

  2. Department of Engineering and Applied Sciences, Sophia University, 7-1 Kioi-cho, Chiyoda-ku, Tokyo, 102-8554, Japan

    T. Adachi

  3. Department of Applied Physics, Tohoku University, 6-6-05 Aoba, Aramaki, Sendai, 980-8579, Japan

    T. Noji & Y. Koike

Authors
  1. Y. Talanov
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  2. L. Salakhutdinov
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  3. T. Adachi
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  4. T. Noji
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  5. Y. Koike
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Correspondence to Y. Talanov.

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Talanov, Y., Salakhutdinov, L., Adachi, T. et al. EPR Study of the Local Magnetic Field Distribution over the Bi2Sr2Ca1−x Y x Cu2O8+y Crystal Surface above the Superconducting Transition Temperature. Appl Magn Reson 46, 897–907 (2015). https://doi.org/10.1007/s00723-015-0685-0

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  • DOI: https://doi.org/10.1007/s00723-015-0685-0

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