title: Magnetocapacitance in nonmagnetic composite 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.
authors.affiliation: Department of Physics, Princeton University, Princeton, NJ 08544, USA. mparish@princeton.edu
authors.forename: Meera M
authors.initials: MM
authors.lastname: Parish
authors.forename: Peter B
authors.initials: PB
authors.lastname: Littlewood