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Measurement of anisotropic resistivity and Hall constant for single-crystal YBa 2 Cu 3 </…

1987; American Physical Society; Volume: 59; Issue: 15 Linguagem: Inglês

10.1103/physrevlett.59.1768

1092-0145

S. W. Tozer, A. W. Kleinsasser, T. Penney, Debra L. Kaiser, F. Holtzberg,

Magnetic and transport properties of perovskites and related materials

The resistivity of single-crystal ${\mathrm{YBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7\mathrm{\ensuremath{-}}\mathrm{x}}$ has been found to be anisotropic, with magnitude and temperature dependence similar to ceramic samples in directions parallel to the Cu-O planes, and with a 30 times larger room-temperature value and a much smaller temperature dependence in the orthogonal direction. The Hall coefficient, with a magnetic field applied parallel to the Cu-O planes, is negative (electronlike) and essentially temperature independent in these crystals, in direct contrast to the behavior of other types of samples.