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

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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.

作者简介

N. Trusevich

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences

Email: trousevich@gmail.com
Moscow, Russia

S. Gavrilkin

Lebedev Physical Institute, Russian Academy of Sciences

Email: rousevich@gmail.com
Moscow, 119991 Russia

L. Trakhtenberg

Semenov Federal Research Center for Chemical Physics, Russian Academy of Sciences;Moscow State University

编辑信件的主要联系方式.
Email: rousevich@gmail.com
Moscow, Russia; Moscow, 119991 Russia

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