Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819031 | Physica C: Superconductivity and its Applications | 2009 | 5 Pages |
Abstract
A magnetic filed relaxation at the center of a pulse-magnetized single-domain Y-Ba-Cu-O superconductor at 78Â K has been studied. In case of a weak magnetization, the magnetic flux density increases logarithmically and normalized relaxation rate defined as SÂ =Â âd(lnB)/d(lnt) is negative (SÂ =Â â0.037). When an external magnetic field magnitude increases, the relaxation rate first decreases in absolute value, then changes sign (becomes positive, SÂ >Â 0) and after reaching some maximum finally reduces to a very small value. Non-monotonous dependence of S vs. Ha is explained by a non-homogeneous local temperature distribution during a pulse magnetization.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
A.A. Kartamyshev, E.P. Krasnoperov, Yu.D. Kuroedov, N.A. Nizhelskiy, O.L. Poluschenko,