Volume 127, Number 3, August 2019
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||13 September 2019|
The magnetic Purcell effect: The case of an emitter near an antiferromagnet
Departamento e Centro de Física, Universidade do Minho - 4710-057, Braga, Portugal and International Iberian Nanotechnology Laboratory (INL) - 4715-330, Braga, Portugal
Received: 21 May 2019
Accepted: 27 July 2019
In this paper we discuss the magnetic Purcell effect of a magnetic dipole near a semi-infinite antiferromagnet. Contrary to the electric Purcell effect, the magnetic one is not so well studied in the literature. We derive the dispersion relation of the surface wave existing at an antiferromagnetic-dielectric interface from the calculation of the reflection coefficient of the structure. After characterizing the surface wave we quantize the electromagnetic vector potential of the surface wave. This allows us to discuss the magnetic Purcell effect via the Fermi golden rule.
PACS: 73.20.Mf – Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) / 76.50.+g – Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance / 75.30.Ds – Spin waves
© EPLA, 2019
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