Nb-Ti composite wires with artificial ferromagnetic pins

Journal Article · Sun Jun 01 00:00:00 EDT 1997 · Advances in Cryogenic Engineering

OSTI ID:482123

Cooley, L D ^[1]; Jablonski, P D ^[2]; Heussner, R W ^[3]

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1. NIST, Boulder, CO (United States)
2. Teledyne Wah Chang, Albany, OR (United States)
3. Univ. of Wisconsin, Madison, WI (United States); and others

Flux-pinning data for Nb47Ti/Fe and Nb55Ti/Ni composites indicate that ferromagnets pin by a barrier mechanism similar to the mechanism studied by Clem for superconductor/insulator multilayers. However, in contrast to Clem`s model, the optimum pin separation should be rather large, because at smaller pin separations the condition {vert_bar}{psi}{vert_bar}{sup 2} = 0 at the superconductor/ferromagnet interface leads to a reduction of T{sub c} and H{sub c2}. Nonetheless, the authors find no indication in the experimental data that pin separations much smaller than the predicted optimum value adversely affect J{sub c}, T{sub c}, or H{sub c2}.

• OSTI ID: 482123
• Report Number(s): CONF-950722-; ISSN 0065-2482; TRN: 97:010609
• Journal Information: Advances in Cryogenic Engineering, Vol. 42B; Conference: CEC/ICMC `95: cryogenic engineering conference and international cryogenic materials conference, Columbus, OH (United States), 17-21 Jul 1995; Other Information: PBD: 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NIOBIUM ALLOYS
MAGNETIC FLUX
TITANIUM ALLOYS
SUPERCONDUCTING WIRES
NICKEL ADDITIONS
IRON ADDITIONS