Anisotropic Magnetoresistance of a Classical Antidot Array

Abstract

A periodic array of cylindrical voids, embedded in a thin film of n-doped GaAs, displays a pronounced anisotropy of the classical magnetoresistance. For a geometry where the magnetic field lies in the plane of the film, we observe a characteristic dependence on the angle between current and magnetic field. This experimental finding provides a first verification of a recently predicted effect and agrees well with theoretical calculations. The observed anisotropy is due to interactions among current distortions by neighboring voids. [S0031-9007(96)00586-8]

Strong angular anisotropy of Voigt effect and other magneto-optical phenomena in ordered metal-dielectric metamaterials

“…1(b)], all components of the permittivity tensorε e can be nonzero and their angular profiles are anisotropic [2,3] (this is similar to the magneto-induced angular anisotropy of magnetoresistance [1,4,14]). The angular profiles of the diagonal components ε The angular profiles of tan β and the polarization rotation angle β as well as sin 2κ and the ellipticity κ are shown in the left part of Fig.…”

“…[1] it was predicted that the strong field dc effective magnetoresistivity tensorρ e (H) = 1/σ e (H) (whereσ e is the macroscopic or bulk effective conductivity tensor) of such metamaterials will exhibit a strong dependence on the precise orientations of the external magnetic field B 0 (with respect to the main crystal lattice axes) and the volume averaged current density J . Sinceσ e can be measured directly, our predictions forσ e (H) were already verified experimentally [4]. A similar magneto-induced anisotropy should exist in the case of ac conductivity, i.e., for the macroscopic or bulk effective permittivity tensorε e of metal-dielectric metamaterials and consequently for their optical properties [2,3].…”

Numerical and analytic results for the macroscopic magneto-transport of three-dimensional periodic composites

“…Some of these theoretical predictions are already verified experimentally (see Refs. [14,15]). An optical analog of this effect is discussed in Refs.…”

On the effective conductivity of the magnetized bounded partially ionized plasma with random irregularities

“…Calculation of the electrical characteristics of a weakly inhomogeneous plasma in a strong magnetic field has been carried out before in [6,[21][22][23]. In [22] this problem was solved exactly for the one-dimensional (1D) layer medium, in which the conductivity of each layer was a random function of the transverse coordinate.…”