Role of bulk pinning in the Clem valley in hysteresis losses in type II superconductors

Journal Article · Thu May 01 04:00:00 EDT 1986 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.337022· OSTI ID:6022772

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

Measurements of hysteresis losses W(h/sub 0/, H/sub b/) at several fixed amplitudes h/sub 0/ versus a static bias magnetic field H/sub b/ collinear to h/sub 0/ and directed along the length or the width of a VTi ribbon which exhibits significant magnetic anisotropy, are reported and are very well reproduced exploiting bulk pinning alone hence neglecting equilibrium diamagnetism and surface barriers. Families of curves of DequivalentW(h/sub 0/, H/sub b/)/W(h/sub 0/,0) vs zequivalentH/sub b//h/sub 0/ at various fixed h/sub 0/ were calculated for planar and cylindrical geometry, neglecting surface steps, using the simple formulas ..mu../sub 0/ j/sub c/ = dB/dx = ..cap alpha../B, ..cap alpha../B/sup 0.5/, ..cap alpha../B/sup 0.1/, ..cap alpha..(1-(B/B/sub c/2)), and ..cap alpha../(B+..delta..) for the bulk critical current density. For slab geometry and the first four functions listed, the curves of D vs z are independent of h/sub 0//H/sub asterisk/ when h/sub 0/

• Research Organization: Physics Department, University of Ottawa, Ottawa, Canada K1N 6N5
• OSTI ID: 6022772
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 59:9; 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
HYSTERESIS
LOSSES
MAGNETIC FLUX
PENETRATION DEPTH
SUPERCONDUCTORS
TITANIUM ALLOYS
TYPE-II SUPERCONDUCTORS
VANADIUM ALLOYS