Orientational anisotropy of the upper critical field in single-crystal YBa2Cu3O7 and Bi2.2CaSr1.9Cu2O8+x

M. J. Naughton, R. C. Yu, P. K. Davies, J. E. Fischer, R. V. Chamberlin, Z. Z. Wang, T. W. Jing, Nai Phuan Ong, P. M. Chaikin

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Abstract

We have measured the dependence of the upper critical magnetic field upon orientation for single-crystal samples of YBa2Cu3O7 and Bi2.2CaSr1.9Cu2O8+x via four-probe resistance. We find continuous behavior of Hc2 for small deviations from parallel orientation for the Y sample, as expected for an anisotropic, three-dimensional superconductor. For the Bi sample, however, our data are more consistent with a thin-film model, exhibiting a cusp at parallel orientation, suggesting that Bi2.2CaSr1.9Cu2O8+x is a quasi-two-dimensional system.

Original languageEnglish (US)
Pages (from-to)9280-9283
Number of pages4
JournalPhysical Review B
Volume38
Issue number13
DOIs
StatePublished - Jan 1 1988

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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    Naughton, M. J., Yu, R. C., Davies, P. K., Fischer, J. E., Chamberlin, R. V., Wang, Z. Z., Jing, T. W., Ong, N. P., & Chaikin, P. M. (1988). Orientational anisotropy of the upper critical field in single-crystal YBa2Cu3O7 and Bi2.2CaSr1.9Cu2O8+x. Physical Review B, 38(13), 9280-9283. https://doi.org/10.1103/PhysRevB.38.9280