Demonstration of the Casimir force between ferromagnetic surfaces of a Ni-coated sphere and a Ni-coated plate

摘要

We demonstrate the Casimir interaction between two ferromagnetic boundarysurfaces using the dynamic atomic force microscope. The experimental data arefound to be in excellent agreement with the predictions of the Lifshitz theoryfor magnetic boundary surfaces combined with the plasma model approach. It isshown that for magnetic materials the role of hypothetical patch potentials isopposite to that required for reconciliation of the data with the Drude model.