Mechanisms of influence of external and internal demagnetization fields on the formation, dynamics, and evolution of vortex structure in twinned YBa₂Cu₃O₇₋ₓ high temperature superconductors

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Abstract

It is shown that in twinned YBa2Cu3O7–x, first large vortex “molecules” pinned at the intersection points of periodic twin boundaries are formed. Low-mobility molecules of similar shape consist of intratwin junction vortices and intertwin junction antivortices, between which Abrikosov and Josephson vortices trapped at the banks of twin boundaries and in twinning boundaries, respectively, are “sandwiched”. An increase in the field leads to an increase in its interaction with the residual demagnetization fields of twins and to the decay of multicomponent vortex molecules into smaller two-component molecules.

About the authors

Kh. R. Rostami

Kotel’nikov Institute of Radio Engineering and Electronics of the Russian Academy of Sciences, Fryazino Branch

Author for correspondence.
Email: rostami@ms.ire.rssi.ru
Russian Federation, Fryazino, 141190

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