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

doi:10.1063/1.99454

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

Rutgers University

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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 language	English
Pages (from-to)	328-330
Number of pages	3
Journal	Applied Physics Letters
Volume	52
Issue number	4
DOIs	https://doi.org/10.1063/1.99454
Publication status	Published - 1988

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ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Cite this

Gyorgy, E. M., Grader, G. S., Johnson, D. W., Feldman, L. C., Murphy, D. W., Rhodes, W. W., Howard, R. E., Mankiewich, P. M., & 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

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title = "Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7 ",

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.",

author = "Gyorgy, {E. M.} and Grader, {G. S.} and Johnson, {D. W.} and Feldman, {Leonard C} and Murphy, {D. W.} and Rhodes, {W. W.} and Howard, {R. E.} and Mankiewich, {P. M.} and Skocpol, {W. J.}",

year = "1988",

doi = "10.1063/1.99454",

language = "English",

volume = "52",

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journal = "Applied Physics Letters",

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T1 - Persistent currents in ceramic and evaporated thin-film toroids of Ba 2YCu3O7

AU - Gyorgy, E. M.

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.

PY - 1988

Y1 - 1988

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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