Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7

E. M. Gyorgy, G. S. Grader, D. W. Johnson, Leonard C Feldman, D. W. Murphy, W. W. Rhodes, R. E. Howard, P. M. Mankiewich, W. J. Skocpol

Research output: Contribution to journal › Article

18 Citations (Scopus)

Abstract

We have demonstrated the existence of circumferential persistent currents in Ba2YCu3O7 ceramic toroids at 77 and 4.2 K and in thin films at 77 K. The field dependence of the critical current densities obtained from these persistent current measurements at 77 K is in fair agreement with that obtained from transport measurements. The persistent critical current densities for fields less than 10 G are 150 A/cm2 for the ceramic at 77 K and 105 A/cm2 for the thin film. A long term experiment showed that the resistivity is less than 3×10 -18 Ω cm at 77 K.

Original languageEnglish
Pages (from-to)328-330
Number of pages3
JournalApplied Physics Letters
Volume52
Issue number4
DOIs
Publication statusPublished - 1988

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toroids
critical current
ceramics
current density
thin films
electrical resistivity

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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Gyorgy, E. M., Grader, G. S., Johnson, D. W., Feldman, L. C., Murphy, D. W., Rhodes, W. W., ... Skocpol, W. J. (1988). Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7 . Applied Physics Letters, 52(4), 328-330. https://doi.org/10.1063/1.99454

Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7 . / Gyorgy, E. M.; Grader, G. S.; Johnson, D. W.; Feldman, Leonard C; Murphy, D. W.; Rhodes, W. W.; Howard, R. E.; Mankiewich, P. M.; Skocpol, W. J.

In: Applied Physics Letters, Vol. 52, No. 4, 1988, p. 328-330.

Research output: Contribution to journal › Article

Gyorgy, EM, Grader, GS, Johnson, DW, Feldman, LC, Murphy, DW, Rhodes, WW, Howard, RE, Mankiewich, PM & Skocpol, WJ 1988, 'Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7 ', Applied Physics Letters, vol. 52, no. 4, pp. 328-330. https://doi.org/10.1063/1.99454
Gyorgy EM, Grader GS, Johnson DW, Feldman LC, Murphy DW, Rhodes WW et al. Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7 . Applied Physics Letters. 1988;52(4):328-330. https://doi.org/10.1063/1.99454
Gyorgy, E. M. ; Grader, G. S. ; Johnson, D. W. ; Feldman, Leonard C ; Murphy, D. W. ; Rhodes, W. W. ; Howard, R. E. ; Mankiewich, P. M. ; Skocpol, W. J. / Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7 . In: Applied Physics Letters. 1988 ; Vol. 52, No. 4. pp. 328-330.
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AU - Grader, G. S.

AU - Johnson, D. W.

AU - Feldman, Leonard C

AU - Murphy, D. W.

AU - Rhodes, W. W.

AU - Howard, R. E.

AU - Mankiewich, P. M.

AU - Skocpol, W. J.

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N2 - We have demonstrated the existence of circumferential persistent currents in Ba2YCu3O7 ceramic toroids at 77 and 4.2 K and in thin films at 77 K. The field dependence of the critical current densities obtained from these persistent current measurements at 77 K is in fair agreement with that obtained from transport measurements. The persistent critical current densities for fields less than 10 G are 150 A/cm2 for the ceramic at 77 K and 105 A/cm2 for the thin film. A long term experiment showed that the resistivity is less than 3×10 -18 Ω cm at 77 K.

AB - We have demonstrated the existence of circumferential persistent currents in Ba2YCu3O7 ceramic toroids at 77 and 4.2 K and in thin films at 77 K. The field dependence of the critical current densities obtained from these persistent current measurements at 77 K is in fair agreement with that obtained from transport measurements. The persistent critical current densities for fields less than 10 G are 150 A/cm2 for the ceramic at 77 K and 105 A/cm2 for the thin film. A long term experiment showed that the resistivity is less than 3×10 -18 Ω cm at 77 K.

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