The vortex dynamics in HTc superconductor in external magnetic field

• Autorzy: Sosnowski J.
• Języki publikacji: EN

Abstrakty

EN

The penetration of magnetic induction into HTc superconductors has been considered taking into account the layered structure of these materials. For magnetic field parallel to the planes a one-dimensional penetration has been considered, while in perpendicular magnetic field it is a two-dimensional problem. The flux creep equation has been considered, whose solution was confirmed by experimental data measured on an Y-Ba-Cu-O sample. The magnetic diffusion equation has been solved for a description of the magnetic induction profiles in an increasing external magnetic field. The dynamic anomalies of the current-voltage characteristics have been then predicted, in agreement with experimental observations. The model taking into account the influence of the vortex-pinning center interaction on the magnetic field dependence of the critical current, has been also applied successfully for description of the anomalies.

Słowa kluczowe

EN

high-temperature superconductor; external magnetic field; critical current; magnetic induction; flux flow; flux pinning; vortex dynamics; barium compound; yttrium compound; magnetic diffusion equation

PL

nadprzewodnik wysokotemperaturowy; zewnętrzne pole magnetyczne; prąd krytyczny; indukcja magnetyczna; przepływ strumienia; dynamika wirowa; związek baru; związek itru

• Wydawca: Instytut Podstawowych Problemów Techniki PAN
• Czasopismo: Journal of Technical Physics
• Rocznik: 2005
• Tom: Vol. 46, no 4
• Strony: 245--255
• Opis fizyczny: Bibliogr. 4 poz., wykr.

Twórcy

autor

Sosnowski J.

• Electrotechnical Institute Pozaryskiego 28, 04-703 Warszawa,

Bibliografia

• 1. J. SOSNOWSKI, Influence of the dynamic vortex-pinning center interaction on the critical current in the layered HTc superconductors, J. Tech. Phys., 45, 1, 21-29, 2004.
• 2. F. WANG, J.K.F. YAU, X. JIN, Studies of vortex pinning and second peak effects, Studies of high temperature superconductors, 42, 45-75, 2002.
• 3. J. SOSNOWSKI, R. CLAD, R. KUENTZLER, S. VILLMINOT, Magnetic hysteresis effects in high Tc oxide superconductors, Supercond. Sci. Technology, 5, 85-91, 1992.
• 4. J. SOSNOWSKI, Superconductivity and applications [in Polish], Editor Electrotechnical Institute, 1-200, 2003.