Magnetic characterization of rare-earth barium cuprate superconductors

Lynn Schneemeyer, E. M. Gyorgy, J. V. Waszczak

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Abstract

We report magnetic characterization of barium rare-earth cuprate superconductors to determine critical current densities as a function of rare-earth constituent. A vibrating sample magnetometer was used to measure M-H loops for fields to 15 kOe of oriented single crystals. Critical current densities are insensitive to rare-earth constituent despite the magnetic moment on the rare-earth ion. Values of critical current densities in the a-b plane vary from 3×105 A/cm2 at 10 K to 2×104 A/cm2 at 77 K. Anisotropy in the critical current density in the a-b plane and perpendicular to this plane was a factor of 2 in a Ba2YbCu3O7 crystal at T=38 K. Aluminum impurities lower critical currents but also reduce the superconducting transition temperature.

Original languageEnglish
Pages (from-to)8804-8806
Number of pages3
JournalPhysical Review B
Volume36
Issue number16
DOIs
StatePublished - 1 Jan 1987

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cuprates
barium
critical current
rare earth elements
current density
magnetometers
magnetic moments
transition temperature
aluminum
impurities
anisotropy
single crystals
crystals
ions

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Schneemeyer, Lynn ; Gyorgy, E. M. ; Waszczak, J. V. / Magnetic characterization of rare-earth barium cuprate superconductors. In: Physical Review B. 1987 ; Vol. 36, No. 16. pp. 8804-8806.
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Magnetic characterization of rare-earth barium cuprate superconductors. / Schneemeyer, Lynn; Gyorgy, E. M.; Waszczak, J. V.

In: Physical Review B, Vol. 36, No. 16, 01.01.1987, p. 8804-8806.

Research output: Contribution to journalArticleResearchpeer-review

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