ISSN:
1572-9605
Schlagwort(e):
Flux creep
;
magnetic relaxation
;
YBa2Cu3Ox
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik
,
Physik
Notizen:
Abstract Magnetic relaxation, with magnetic fields applied parallel to the c axis, was measured in a high-quality melt-textured YBa2Cu3Ox bar. Zero-field-cooled magnetization-versus-time data were obtained within a regime of field and temperatures dominated by single vortex pinning. The activation pinning energy U = U M was calculated from experimental data and compared to U = U 0 ln(J c /J), where U, is a constant, J c is the critical current density, and J the current density. This expression for U obtains within the individual pinning regime. A logarithmic dependence of U M on J was found, and the data indicated that a scaling function of U M , g(T/T c ) = (1−T/T c )1/2, was appropriate for describing the single-vortex pinning regime.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1007704203277
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