Magneto-optic Kerr effect in a spin-polarized zero-moment ferrimagnet
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2018Author:
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Fleischer, K., Thiyagarajah, N., Lau, Y.C., Betto, D., Borisov, D., Smith, C.C., Shvets, I.V., Coey, J.M.D. & Rode, K., Magneto-optic Kerr effect in a spin-polarized zero-moment ferrimagnet, Physical Review B, 98, 13, 2018Download Item:
Abstract:
The magneto-optical Kerr effect (MOKE) is often assumed to be proportional to the magnetization of a magnetically ordered metallic sample; in metallic ferrimagnets with chemically distinct sublattices, such as rare-earth transition-metal alloys, it depends on the difference between the sublattice contributions. Here we show that in a highly spin polarized, fully compensated ferrimagnet, where the sublattices are chemically similar, a signal is observed even when the net moment is negligible. We analyze the spectral ellipsometry and MOKE of Mn2RuxGa and show that this behavior is due to a highly spin-polarized conduction band dominated by one of the two manganese sublattices (4c) which creates helicity-dependent reflectivity dominated by a broad Drude tail. Our findings open prospects for studying spin dynamics in the infrared.
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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.134445http://hdl.handle.net/2262/90909
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Science Foundation Ireland (SFI)
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http://people.tcd.ie/fleisckhttp://people.tcd.ie/jcoey
http://people.tcd.ie/ivchvets
http://people.tcd.ie/chsmith
http://people.tcd.ie/rodek
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Author: Fleischer, Karsten; Coey, John; Rode, Karsten; Smith, Christopher; Shvets, Igor; Thiyagarajah, Naganivetha; Lau, Yong-Chang; Betto, Davide; Borisov, Kiril
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https://journals.aps.org/prb/abstract/10.1103/PhysRevB.98.134445http://hdl.handle.net/2262/90909
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Physical Review B;98;
13;
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Electrical conductivity, Ferrimagnetism, Magnetism, Magneto-optical Kerr effect, Optical conductivityDOI:
http://dx.doi.org/10.1103/PhysRevB.98.134445Metadata
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