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Pinning of a Magnetic Flux in Polycrystalline YBa2Cu3O6.92 HTSC during Cooling in a Weak Magnetic Field

  • ORDER, DISORDER, AND PHASE TRANSITION IN CONDENSED SYSTEM
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Abstract

The behavior of fine-grained YBa2Cu3O6.92 HTSCs during cooling in a weak magnetic field is investigated. The magnetization of samples, the crystallite sizes is which are comparable with the magnetic field penetration depth, is comprehensively analyzed in the range below the superconducting transition temperature. When the crystallite size is smaller than 0.5 μm, vortices are shown not to be fixed to pinning centers, and the temperature dependence of magnetization is completely determined by the screening of crystallites and the temperature of appearance of intercrystallite superconducting currents.

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ACKNOWLEDGMENTS

We thank A.A. Vishnev for the synthesis of samples and K.S. Pigalskii for useful discussions of the results obtained.

Funding

This work was supported by a grant from the Ministry of Education and Science to the N. N. Semenov Federal Research Center for Chemical Physics to fulfill the state task “Next-generation nanostructured systems with unique functional properties” (registration number no. 122040500071-0).

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Authors and Affiliations

  1. Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences, Moscow, Russia

    N. G. Trusevich & L. I. Trakhtenberg

  2. Lebedev Physical Institute, Russian Academy of Sciences, 119991, Moscow, Russia

    S. Yu. Gavrilkin

  3. Moscow State University, 119991, Moscow, Russia

    L. I. Trakhtenberg

Authors
  1. N. G. Trusevich
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  2. S. Yu. Gavrilkin
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  3. L. I. Trakhtenberg
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Correspondence to N. G. Trusevich.

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Translated by K. Shakhlevich

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Trusevich, N.G., Gavrilkin, S.Y. & Trakhtenberg, L.I. Pinning of a Magnetic Flux in Polycrystalline YBa2Cu3O6.92 HTSC during Cooling in a Weak Magnetic Field. J. Exp. Theor. Phys. 137, 356–361 (2023). https://doi.org/10.1134/S1063776123090157

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  • DOI: https://doi.org/10.1134/S1063776123090157

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