Is magnetic pinning a dominant mechanism in Nb-Ti

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:6119789

Cooley, L D; Lee, P J; Larbalestier, D C ^[1]

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1. Wisconsin Univ., Madison, WI (United States). Applied Superconductivity Center

In this paper, the authors compare the pinning behavior of an artificial pinning center (APC) composite and a nanometer-filament Nb 46.5 wt% Ti composite to that of a conventional Nb 48 wt% Ti composite. The microstructure of the APC composite resembles the conventional composite, where ribbons of normal metal form the pinning centers, whereas the nanometer-filament composite has no internal normal metal but pins instead at the filament surface. The APC composite exhibits much stronger pinning relative to B{sub c {sub 2}} than the conventional composite (21.4 GN/m{sup 3}, 7 T vs. 18.9 GN/m{sup 3}, 11 T), which is possibly due to the increased amount of pinning center (50 vol.% vs. 25 vol.%), however the proximity effect reduces the B{sub c {sub 2}} unfavorably.

• OSTI ID: 6119789
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
COMPARATIVE EVALUATIONS
COMPOSITE MATERIALS
EVALUATION
FILAMENTS
MAGNETIC FLUX
MATERIALS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
PROXIMITY EFFECT
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
TRANSITION TEMPERATURE