Tunable Magneto-Optical Effects in Antiferromagnetic Structures

Macêdo, R. , Dumelow, T. and Stamps, R.L. (2015) Tunable Magneto-Optical Effects in Antiferromagnetic Structures. In: 2015 9th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), Oxford, UK, 7-12 Sept 2015, pp. 454-456. ISBN 9781479978366 (doi:10.1109/MetaMaterials.2015.7342485)

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Close to the magnon resonance frequency, antiferromagnets act as indefinite permeability media, i.e., not all their permeability tensor components are of the same sign. This behavior can induce a series of optical effects such as all-angle negative refraction. In the presence of an external field, a non-reciprocal lateral shift on reflection is also possible. We illustrate these effects using the example of MnF2. In this crystal both the angle of refraction and the Goos-Hänchen shift become tunable when an external magnetic field is applied.

Item Type:Conference Proceedings
Keywords:Antiferromagnetic materials, light reflection, light refraction, magnetic permeability, magneto-optical effects, magnons, manganese compounds, optical metamaterials, optical tuning, Goos-Hänchen shift, MnF2, all-angle negative refraction, antiferromagnetic structures, antiferromagnets, crystal, external magnetic field, light reflection, magnon resonance frequency, nonreciprocal lateral shift, permeability media, permeability tensor, refraction angle, tunable magneto-optical effects, crystals, magnetic resonance, magnetic separation, magnetomechanical effects, permeability, tensile stress.
Glasgow Author(s) Enlighten ID:Stamps, Professor Robert and Macedo, Dr Rair
Authors: Macêdo, R., Dumelow, T., and Stamps, R.L.
College/School:College of Science and Engineering > School of Physics and Astronomy
Published Online:03 December 2015

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