Hall-effect in LuNi2B2C in normal and superconducting mixed states
V. N. Narozhnyi, J. Freudenberger, V. N. Kochetkov, K. A. Nenkov, G. Fuchs, K. -H. Müller
Abstract
The Hall resistivity rhoxy of LuNi2B2C is negative in the normal as well as in the mixed state and has no sign reversal typical for high-Tc superconductors. A distinct nonlinearity in the rhoxy dependence on field H was found in the normal state for T < 40K, accompanied by a large magnetoresistance reaching +90% for mu0H=16T at T=20K. The scaling relation rhoxy ~ ρxxβ(ρxx is the longitudinal resistivity) was found in the mixed state, the value of βbeing dependent on the degree of disorder.
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