FLUX PINNING MECHANISM OF
ARTIFICIALLY INTRODUCEDNb INTO SUPERCONDUCTING Nb-Ti
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