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Vortex matter in superconductors

Journal Article


Abstract


  • The behavior of a vortex ensemble in high-temperature superconducting biaxially-oriented films YBa2Cu3O7-�� (YBCO) at different orientations of applied magnetic field within Shubnikov's phase has been studied. The study has been carried out by measuring the current-voltage characteristics, as well as the resonance frequency and damping curves with the transport current flowing through an oscillating superconductor. In contrast to single crystals, the behavior of vortices in the YBCO films is determined by their interactions with linear defects edge dislocations formed during film deposition due to the pseudomorphis epitaxial growth process. These dislocations are the dominating sort of crystal defects whose density can exceed 1015 lines/m2. Effective vortex pinning and high critical current density (Jc ��� 3.1010 A/m2 at 77 K) in well-prepared perfect YBCO films are indeed caused by the high density of such linear defects. New phases of the vortex matter in YBCO films for quasi-statics and dynamics are found and studied. The interactions of vortices with crystal defects, different kinds of vortex lattice disorder, and complex depinning are shown to be responsible for these states. An H-T phase diagram for the vortex matter in the YBCO films is proposed.

Publication Date


  • 2001

Citation


  • Pan, V. M., & Pan, A. V. (2001). Vortex matter in superconductors. Fizika Nizkikh Temperatur (Kharkov), 27(9-10), 991-1011.

Scopus Eid


  • 2-s2.0-0035440254

Web Of Science Accession Number


Start Page


  • 991

End Page


  • 1011

Volume


  • 27

Issue


  • 9-10

Place Of Publication


Abstract


  • The behavior of a vortex ensemble in high-temperature superconducting biaxially-oriented films YBa2Cu3O7-�� (YBCO) at different orientations of applied magnetic field within Shubnikov's phase has been studied. The study has been carried out by measuring the current-voltage characteristics, as well as the resonance frequency and damping curves with the transport current flowing through an oscillating superconductor. In contrast to single crystals, the behavior of vortices in the YBCO films is determined by their interactions with linear defects edge dislocations formed during film deposition due to the pseudomorphis epitaxial growth process. These dislocations are the dominating sort of crystal defects whose density can exceed 1015 lines/m2. Effective vortex pinning and high critical current density (Jc ��� 3.1010 A/m2 at 77 K) in well-prepared perfect YBCO films are indeed caused by the high density of such linear defects. New phases of the vortex matter in YBCO films for quasi-statics and dynamics are found and studied. The interactions of vortices with crystal defects, different kinds of vortex lattice disorder, and complex depinning are shown to be responsible for these states. An H-T phase diagram for the vortex matter in the YBCO films is proposed.

Publication Date


  • 2001

Citation


  • Pan, V. M., & Pan, A. V. (2001). Vortex matter in superconductors. Fizika Nizkikh Temperatur (Kharkov), 27(9-10), 991-1011.

Scopus Eid


  • 2-s2.0-0035440254

Web Of Science Accession Number


Start Page


  • 991

End Page


  • 1011

Volume


  • 27

Issue


  • 9-10

Place Of Publication