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Title: Observation of magnons in Mn2Au films by inelastic Brillouin and Raman light scattering M. Arana,1,2 F. Estrada,
Title of periodic: Applied Physics Letters
Authors: Arana, M.
Estrad, F.
Maior, D.S.
Mendes, J.B.S.
Fernandes-Outon, L. E.
Macedo, Waldemar Augusto Almeida
Barthen, V. M.T. S.
Givord, D.
Azevedo, A.
Rezende, S. M.
Affiliation: Universidade Federal de Pernambuco, Recife, PE, Brasil
Universidade Federal de Pernambuco, Recife, PE, Brasil
Universidade Federal de Pernambuco, Recife, PE, Brasil
Universidade Federal de Viçosa, Viçosa, MG, Brasil
Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brasil
Centro de Desenvolvimento da Tecnologia Nuclear, CDTN, Belo Horizonte, MG, Brasil
Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil
Universit e Grenoble Alpes, Institut Neel, Grenoble, France
Universidade Federal de Pernambuco, Recife, PE, Brasil
Issue Date: 2017
Keywords: scattering;Raman
Abstract: The intermetallic antiferromagnetic compound Mn2Au has been attracting considerable interest for antiferromagnetic spintronics due to its high N eel temperature and strong spin–orbit coupling. We report on the experimental investigation of the zero-wave number magnon frequencies in Mn2Au films using Brillouin and Raman inelastic light scattering techniques. The derived effective anisotropy field values are in close agreement with theoretical calculations. With the values of the anisotropy and exchange fields, the full magnon dispersion curves in Mn2Au were calculated. Due to the weak in-plane anisotropy, the k 0 frequency of the lower magnon branch, 121 GHz, is among the lowest for 3D antiferromagnets, suggesting that Mn2Au is a good candidate for realizing the generation of spin currents by antiferromagnetic resonance driven spin-pumping, as proposed theoretically
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Appears in Collections:Artigo de periódico

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