Magnetic spheres in microwave cavities

Journal article (2015)
Department
QN/Quantum Nanoscience (AS) (TU Delft)
Copyright: © 2015 American Physical Society
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Published Date

25-06-2015

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Source:

Physical Review B, 91 (21), 2015

Faculty

Applied Sciences

Department

QN/Quantum Nanoscience

Abstract

We apply Mie scattering theory to study the interaction of magnetic spheres with microwaves in cavities beyond the magnetostatic and rotating wave approximations. We demonstrate that both strong and ultrastrong coupling can be realized for stand alone magnetic spheres made from yttrium iron garnet (YIG), acting as an efficient microwave antenna. The eigenmodes of YIG spheres with radii of the order mm display distinct higher angular momentum character that has been observed in experiments.

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