Abstract
The angular dependent magnetoresistance oscillation and Shubnikov-de Haas (SdH) effect were observed in α -Et 2Me 2N[Ni(dmit) 2] 2. The former data showed magic angles, θ n characterized by tan(θ n-90)=(-0.5+n) × 0.47 (n:integer). The data of the SdH effect revealed the existence of two types of oscillations. From the period of the resistance oscillation vs. the inverse magnetic field, the cross-sectional areas of the Fermi surfaces perpendicular to the a ∗-axis, associated with these two types of oscillations, are estimated to be ∼ 0.23% and ∼ 4.5% of the two dimensional Brillouin zone, respectively. The angular dependence of the SdH fundamental field shows two-dimensional nature of the band structure.
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