Magnetocapacitance in non-magnetic inhomogeneous media

Details Magnetocapacitance in non-magnetic inhomogeneous media Magnetocapacitance in non-magnetic inhomogeneous media

2008-07-23

arxiv.org/abs/0807.3625v1

Phys. Rev. Lett. 101, 166602 (2008)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.101.166602

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.

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