Hysteresis losses and magnetic phenomena in ribbons of type II superconductors in the noncollinear regime

Journal Article · Fri Jun 01 04:00:00 EDT 1984 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.332993· OSTI ID:6833337

LeBlanc, M A.R.; Lorrain, J P

We have measured hysteresis losses, W(h/sub 0/, h/sub b/, H/sub b//sub 0/), in ribbons of VTi and Nb subjected to oscillating magnetic fields of various amplitudes h/sub 0/ directed transverse to a static bias magnetic field H/sub b//sub 0/, hence the name, noncollinear regime. A second bias field h/sub b/ along h/sub 0/ may also be introduced. H/sub b//sub 0/ and h/sub 0/ are directed along the length and width of the ribbon respectively or vice versa (90/sup 0/ rotation). The families of data curves are compared with the predictions of double critical state models where (i) dB/dx = +- F/sub P/(B)/B governs the critical gradients of the magnetic induction and (ii) dtheta/dx = +- F/sub P/(B)F(theta)/B/sup 2/, the spatial variation of the orientation of the sheets of flux lines, with theta = 0 along H/sub b//sub 0/. The effect on W(h/sub 0/,h/sub b/,H/sub b//sub 0/) of choosing F(theta) = 1/tan theta, k and k/(1+Vertical BarthetaVertical Bar)/sup 2/ is illustrated and the latter is seen to yield the best agreement. The locus of the magnetization along the length and width of the samples, and , have been monitored separately and simultaneously during the cycles of h/sub 0/(t) for various h/sub 0/ and H/sub b//sub 0/ with h/sub b/ = 0 or h/sub 0/.

• Research Organization: Physics Department, University of Ottawa, Ottawa, Canada K1N 6N5
• OSTI ID: 6833337
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 55:11; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
DATA
ELEMENTS
EXPERIMENTAL DATA
HYSTERESIS
INFORMATION
MAGNETIC FIELDS
METALS
NIOBIUM
NUMERICAL DATA
SUPERCONDUCTORS
TITANIUM ALLOYS
TRANSITION ELEMENTS
TYPE-II SUPERCONDUCTORS
VANADIUM ALLOYS