Temperature dependence of the Casimir force between a superconductor and a magnetodielectric

Norio Inui

doi:10.1103/PhysRevA.86.022520

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Temperature dependence of the Casimir force between a superconductor and a magnetodielectric

Norio Inui

DOI 10.1103/PhysRevA.86.022520 · Physical Review A

T1

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Abstract

We investigate the dependence of the Casimir force between a superconducting plate (niobium) and a magnetodielectric plate (yttrium iron garnet) on the temperature near the transition point within a two-fluid model. For large separations between the plates, the direction of the Casimir force changes from attractive to repulsive as the temperature decreases below the transition temperature, because of an increase in superconducting current density. We show that this increase in the repulsive contribution to the Casimir force, which depends on the magnetic permeability of the magnetodielectric plate, can be experimentally verified by measuring the force acting on the magnetodielectric plate inserted midway between a superconducting plate and a normal conducting plate.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8.31	Pressure not reported	unknown