Hysteresis losses in Bi-2223 superconductors

Journal Article · Mon Jul 01 04:00:00 EDT 1996 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.511455· OSTI ID:287709

Paasi, J; Tuohimaa, A ^[1]

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1. Tampere Univ. of Technology (Finland). Lab. of Electricity and Magnetism

In this study the authors examine magnetic hysteresis losses in Bi-2223 bulk superconductors. Two kinds of hysteresis losses were found in the samples: losses in superconducting grains and losses due to the intergranular weak link structure. Total losses at 77 K were about an order of magnitude higher than losses in grains. This indicates the domination of intergranular hysteresis losses with respect to intragrain losses. To understand the experimental results, they numerically simulated the behavior with model specimens, where different kinds of Josephson junction arrays worked as the models for the intergrain system. A special attention was paid to the influence of porosity, second phase particles, and magnetically induced granularity on the hysteresis losses. If at least one of the inhomogeneity sources was present, the magnetization of the array could exhibit remarkable hysteresis and losses.

• OSTI ID: 287709
• Report Number(s): CONF-950691--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 4Pt1 Vol. 32; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BISMUTH OXIDES
CALCIUM OXIDES
COMPUTERIZED SIMULATION
COPPER OXIDES
CRITICAL CURRENT
ENERGY LOSSES
EXPERIMENTAL DATA
HIGH-TC SUPERCONDUCTORS
HYSTERESIS
MAGNETIC FLUX
STRONTIUM OXIDES