Magnetocapacitance in non-magnetic inhomogeneous media

Abstract

The dielectric response in a magnetic field is routinely used to probe the existence of coupled magnetic and elastic order in the multiferroics. However, here we demonstrate that magnetism is not necessary to produce a magnetocapacitance when the material is inhomogeneous. By considering a two-dimensional, two-component composite medium, we find a characteristic dielectric resonance that depends on magnetic field. We propose this as a possible signature of inhomogeneities and we argue that this behavior has already been observed in nanoporous silicon and some manganites.

4 pages, 4 figures

References in corpus (10)

• Materials with Colossal Dielectric Constant: Do They Exist?
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• Magnetodielectric Coupling in Nonmagnetic Au/GaAs:Si Schottky Barriers
• A large magnetoinductance effect in La0.67Ba0.33MnO3
• Multi-Fields Modulation of Physical Properties of Oxide Thin Films