Large negative magnetoresistance in thiospinel CuCrZrS4

Takao Furubayashi; Hiroyuki Suzuki; Nami Kobayashi; Shoichi Nagata

doi:10.1016/j.ssc.2004.06.020

paper

Large negative magnetoresistance in thiospinel CuCrZrS4

arXiv:cond-mat/0406459 · doi:10.1016/j.ssc.2004.06.020

Abstract

We report on large negative magnetoresistance observed in ferromagnetic thiospinel compound CuCrZrS $_{4}$ . Electrical resistivity increased with decreasing temperature according to the form proportional to $exp (T_{0} / T)^{1/2}$ , derived from variable range hopping with strong electron-electron interaction. Resistivity under magnetic fields was expressed by the same form with the characteristic temperature T0 decreasing with increasing magnetic field. Magnetoresistance ratio $ρ (T, 0) / ρ (T, H)$ is 1.5 at 100 K for H=90 kOe and increases divergently with decreasing temperature reaching 80 at 16 K. Results of magnetization measurements are also presented. Possible mechanism of the large magnetoresistance is discussed.

9 pages, 5 figures, to be published in Solid State Commun