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Magnetisation and Critical Currents in High Tc Powders

Published online by Cambridge University Press:  28 February 2011

A. M. Campbell ,
A. D. Hibbs ,
J. Eberharde ,
S. Male ,
M. F. Ashby  and
J. E. Evetts
A. M. Campbell
Affiliation:
University of Cambridge, Cambridge, U.K., C.E.R.L., Leatherhead
A. D. Hibbs
Affiliation:
University of Cambridge, Cambridge, U.K., C.E.R.L., Leatherhead
J. Eberharde
Affiliation:
University of Cambridge, Cambridge, U.K., C.E.R.L., Leatherhead
S. Male
Affiliation:
University of Cambridge, Cambridge, U.K., C.E.R.L., Leatherhead
M. F. Ashby
Affiliation:
University of Cambridge, Cambridge, U.K., C.E.R.L., Leatherhead
J. E. Evetts
Affiliation:
University of Cambridge, Cambridge, U.K., C.E.R.L., Leatherhead
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Abstract

Magnetisation curves have been measured on powders of various sizes. The hysteresis decreases with size for articles smaller than 20μ showing that barriers to current flow are at least this far apart. The current density is 6×106 amps/cm2 at 1.5T and this is consistent with theoretical calculations of Jc. Inductive transitions are consistent with a penetration depth of about 0.5μ at 78K. The results of Hot Isostatic Pressing are also discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 99: Symposium AA – High-Temperature Superconductors , 1987 , 883
Copyright
Copyright © Materials Research Society 1988

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References

REFERENCES

[1] Kogan, V.G., and Clem, J.R.: Jpn. J. Appl. Phys. (Proc. LT18), 1987, p1159 Google Scholar
[2] Clem, J. R. and Kogan, V.G.: Jpn. J. Appl. Phys. (Proc. LT18), 1987 p1161 Google Scholar
[3] Farrell, D.E., Chandrasekhar, B.S., DeGuire, M.R., Fang, M.M., Kogan, V.G., Clem, J.R., and Finnemore, D.K.: Phys. Rev. B, 36, 1987, p 4025.Google Scholar
[4] Ashby, M.F., Lulea Conference on HIPing, Lulea, Sweded, 1982 Google Scholar
[5] Glowacki, B.A. and Evetts, J.E., Proc. this Conference.Google Scholar