In-plane magnetoresistance (MR) and Hall effect of Bi2Sr2CuOx crystals with
T-c = 4-9.5 K were investigated in DC magnetic fields up to 28 T. For T <
10 K the crystals show a classical positive MR. Above 14 K, a negative MR a
ppears. The linear T-dependence of cot Theta(H) in the normal state closely
resembles that of the normal-state resistivity as expected for a Fermi-liq
uid picture. (C) 2000 Elsevier Science B.V. All rights reserved.