Magnetization measurements of single levitated grains of Ba2YCu3O7

An electrodynamic balance has been constructed in which the perturbative forces from applied magnetic fields are used to probe the superconducting properties of single levitated charged grains of high Tc superconductors with diameters ≲10 μm. The low-temperature magnetization of selected Ba2YCu3O7 g...

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Bibliographic Details
Published in:Applied physics letters 1988-11, Vol.53 (22), p.2238-2240
Main Authors: GRADER, G. S, HEBARD, A. F, EICK, R. H
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Physics
Properties of type I and type II superconductors
Superconductivity
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Summary:An electrodynamic balance has been constructed in which the perturbative forces from applied magnetic fields are used to probe the superconducting properties of single levitated charged grains of high Tc superconductors with diameters ≲10 μm. The low-temperature magnetization of selected Ba2YCu3O7 grains has been observed to exhibit a flux exclusion near 80% of the theoretical maximum. Hysteresis, flux creep, and the lower critical field are identified.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.100513