Calculation of magnetic flux profiles and deduction of critical current densities for type II superconductors

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

OSTI ID:5712741

Cave, J R; Critchlow, P R ^[1]; Lambert, P; Champagne, B ^[2]

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1. Materials Technology, VPR Hydro-Quebec, 1800 Montee Ste-Julie, Varennes, Quebec (CA)
2. National Research Council/MI, 75 Blvd. de Mortagne, Boucherville, Quebec (CA)

The critical state concept for the calculation of internal flux profiles in type II super- conductors is used to model the magnetization behavior of high T{sub c} materials. In this application of the model, the field dependent reversible magnetization, and critical current density are incorporated flexibly into numerical solutions of the basic equations. The solutions are compared to results obtained by using the Bean (constant J{sub c}) and Kim (field dependent J{sub c}) approximations. The authors use theoretically calculated magnetization curves to analyze recently published, and also our own, experimental magnetization data for bulk, textured Y/ErBaCuO samples. In this paper pitfalls and guidelines when using such measurements to obtain intrinsic material critical current densities are discussed.

• OSTI ID: 5712741
• Report Number(s): CONF-900944-; CODEN: IEMGA
• Journal Information: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States), Vol. 27:2; Conference: 1990 applied superconductivity conference, Snowmass, CO (United States), 24-28 Sep 1990; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ERBIUM OXIDES
MAGNETIZATION
HIGH-TC SUPERCONDUCTORS
YTTRIUM OXIDES
BARIUM COMPOUNDS
COPPER COMPOUNDS
CRITICAL CURRENT
CURRENT DENSITY
EXPERIMENTAL DATA
MAGNETIC FLUX
NUMERICAL SOLUTION
THEORETICAL DATA
TYPE-II SUPERCONDUCTORS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CURRENTS
DATA
ELECTRIC CURRENTS
ERBIUM COMPOUNDS
INFORMATION
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties