Measurement of anisotropic resistivity and Hall constant for single-crystal YBa2Cu3O7-x

The resistivity of single-crystal YBa2Cu3O7-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. © 1987 The American Physical Society.