Electrical anisotropy of α-(BEDT-TTF)2KHg(SCN)4

The transverse magnetoresistance of α-(BEDT-TTF)2KHg(SCN)4 was investigated with the magnetic field rotated within a conducting ac-plane. It was found that the magnetic-field-orientation dependence of the magnetoresistance in the weak-field limit, ΔR(B,θ), has the form ΔR(B,θ) = B2(psin2(θ − θmin) + qcos2(θ − θmin)), where θ is the angle between a-axis and magnetic field direction and (p, q, θmin) are temperature-dependent parameters. By examining the results based on the classical theory of magnetoresistance, it was concluded that the electrical anisotropy within bc-plane is 3.5∼4.5 and 2.5∼3.0 above and below the phase transition at 10 K, respectively.