### Title, author, abstract

title
FLUX PINNING MECHANISM OF ARTIFICIALLY INTRODUCEDNb INTO SUPERCONDUCTING Nb-Ti
authors
Teruo Matsushita
Department of Computer Science and Electronics, Kyushu Institute of Technology,
680--4 Kawazu, Iizuka, 820 JAPAN
abstract
The elementary pinning force of a thin Nb layer introduced as an artificial pinning centers in Nb-Ti is theoretically calculated at relatively low fields using the Ginzburg-Landau theory. The pinning interaction originates from the kinetic energy due to the induced superconductivity in the Nb layer by the proximity effect and the layer acts as a repulsive pinning center. This is different from the $\alpha$-Ti layer acting as an attractive one through the condensation energy interaction. The elementary pinning force depends sensitively on the coherence length in the Nb layer. It turns out that this elementary pinning force is stronger in usual cases than that of the $\alpha$-Ti layer in commercial Nb-Ti wires.
Original paper appears in
8th International Workshop on Critical Current
May 27-29, 1996
Kitakyushu, Japan