Large negative magnetoresistance in thiospinel CuCrZrS4

Details Large negative magnetoresistance in thiospinel CuCrZrS4 Large negative magnetoresistance in thiospinel CuCrZrS4

2004-06-21

arxiv.org/abs/cond-mat/0406459v1

Physics

Condensed Matter

Strongly Correlated Electrons

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

Scientific paper

10.1016/j.ssc.2004.06.020

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 $\textrm{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 $\rho (T,0)/\rho(T,H)$ 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.

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