Large linear magnetoresistivity in strongly inhomogeneous planar and layered systems

Abstract

Explicit expressions for magnetoresistance $R$ of planar and layered strongly inhomogeneous two-phase systems are obtained, using exact dual transformation, connecting effective conductivities of in-plane isotropic two-phase systems with and without magnetic field. These expressions allow to describe the magnetoresistance of various inhomogeneous media at arbitrary concentrations $x$ and magnetic fields $H$. All expressions show large linear magnetoresistance effect with different dependencies on the phase concentrations. The corresponding plots of the $x$- and $H$-dependencies of $R(x,H)$ are represented for various values, respectively, of magnetic field and concentrations at some values of inhomogeneity parameter. The obtained results show a remarkable similarity with the existing experimental data on linear magnetoresistance in silver chalcogenides $A{g}_{2+\delta }Se.$ A possible physical explanation of this similarity is proposed. It is shown that the random, stripe type, structures of inhomogeneities are the most suitable for a fabrication of magnetic sensors and a storage of information at room temperatures.

12 pages, 2 figures, Latex2e

References in corpus (4)

• Non-saturating magnetoresistance in heavily disordered semiconductors
• Liquid-like spatial distribution of magnetic polarons revealed by neutron scattering in La{1-x}Ca{x}MnO3
• Duality and exact results for conductivity of 2D isotropic heterophase systems in magnetic field
• Planar isotropic two-phase systemsin perpendicular magnetic field: effective conductivity

Cited by in corpus (6)

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• Linear magnetoresistance from Dirac-like fermions in graphite
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• Classical Hall transition and magnetoresistance in strongly inhomogeneous planar systems
• A conducting nano-filament (CNF) network as a precursor to the origin of superconductivity in electron-doped copper oxides
• Spin-orbital polarons in electron doped copper oxides