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Phonon echo probing of high-temperature superconductors containing magnetic ions

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Abstract

Polycrystalline high-temperature superconductors (HTSCs) containing iron and gadolinium ions have been studied using the phonon echo technique, whereby a powdered sample is probed by a special sequence of RF pulses and the response having an acoustic nature is measured. It is shown that the behavior of this signal in the iron-containing HTSC materials exhibits some distinctive features in comparison to the response of a conventional yttrium-based ceramic. The superconducting gap estimated for the samples with magnetic ions does not differ significantly from the value for a usual HTSC. This fact is related to a spatial separation of the magnetic and superconducting phases in the materials studied.

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Authors and Affiliations

  1. Ioffe Physicotechnical Institute, Russian Academy of Sciences, St. Petersburg, 194021, Russia

    I. V. Pleshakov, A. A. Nechitaĭlov & A. P. Paugurt

  2. Fock Institute of Physics, St. Petersburg State University, St. Petersburg, 199164, Russia

    V. V. Matveev

  3. Institute for Analytical Instrumentation, Russian Academy of Sciences, St. Petersburg, 190103, Russia

    Ya. A. Fofanov

  4. Wihuri Physical Laboratory, Department of Physics, University of Turku, FIN-20014, Turku, Finland

    Eero Ylinen

Authors
  1. I. V. Pleshakov
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  2. A. A. Nechitaĭlov
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  3. A. P. Paugurt
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  4. V. V. Matveev
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  5. Ya. A. Fofanov
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  6. Eero Ylinen
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Correspondence to I. V. Pleshakov.

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Original Russian Text © I.V. Pleshakov, A.A. Nechitaĭlov, A.P. Paugurt, V.V. Matveev, Ya.A. Fofanov, Eero Ylinen, 2007, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2007, Vol. 33, No. 24, pp. 38–45.

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Pleshakov, I.V., Nechitaĭlov, A.A., Paugurt, A.P. et al. Phonon echo probing of high-temperature superconductors containing magnetic ions. Tech. Phys. Lett. 33, 1050–1053 (2007). https://doi.org/10.1134/S106378500712019X

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  • DOI: https://doi.org/10.1134/S106378500712019X

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