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

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 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

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., 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",

pages = "328--330",

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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