Van der Waals attraction between spherical voids in a magnetic medium

I. Brevik and H. Skurdal

Physica A: Statistical Mechanics and its Applications, 1993, vol. 199, issue 3, 412-430

Abstract: The van der Waals force between two spherical voids surrounded by a magnetic (paramagnetic or diamagnetic) isotropic medium is calculated. Our method of calculation is analogous to the method of Mitchell and Ninham [J. Chem. Phys. 56 (1972) 1117] carried out in the electric case. A simple Lorentz form is adopted for the frequency dependent permeability. Retardation effects are ignored, whereby the electric and magnetic forces become additive. It is shown that the omission of retardation is a better approximation in the magnetic case than in the electric case due to the fact that the magnetic proper frequencies ω0m appearing in the Lorentz dispersion relation are much lower than the electric proper frequencies ω0e. Our formalism is generalized also to the case of finite temperatures.

Date: 1993
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:199:y:1993:i:3:p:412-430

DOI: 10.1016/0378-4371(93)90057-B

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