Title, author, abstract

title
ELECTRIC FIELD STRUCTURE ON THE SURFACE OF SUPERCONDUCTING Pb-In SLAB IN LONGITUDINAL MAGNETIC FIELD
authors
A. Shimogawa, N. Morita, E. S. Otabe T. Matsushita
Department of Computer Science and Electronics, Kyushu Institute of Technology,
680--4 Kawazu, Iizuka, 820 JAPAN
abstract
The structure of electric field on the surface of superconducting Pb-In slab samples was measured under the longitudinal magnetic field. A region with a negative electric field was observed as well as in a cylindrical sample. However, the obtained structure was different from the helical one observed by Ezaki and Irie for a cylindrical sample. The negative electric field originates from the term of $\boldmath{B}\times\boldmath{v}$ and appears at a position where the flux lines are pushed out of the sample, where $\boldmath{B}$ and $\boldmath{v}$ are the magnetic flux density and the velocity of flux lines, respectively. It was found that the averaged resistivity increased with increasing magnetic field. This result is similar to that in the transverse magnetic field and can be interpreted in terms of the Bardeen-Stephen model. As a result it is concluded that the energy dissipation in the longitudinal field is also caused by the motion of flux lines.
Original paper appears in
9th International Symposium on Superconductivity
October 21--25, 1996
Sapporo, Hokkaido, Japan