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TitleRoom temperature paramagnetism of ZnO:Mn films grown by RF-sputtering
Author(s)Oliveira, Filipe André
Cerqueira, M. F.
Vasilevskiy, Mikhail
Viseu, T. M. R.
Campos, J. Ayres de
Rolo, Anabela G.
Martins, J. S.
Sobolev, N. A.
Alves, E.
Magnetic resonance
Faraday effect
Issue date2010
JournalThin Solid Films
Abstract(s)ZnO:Mn transparent thin films (thickness b1 μm) with the Mn contents ranging from 1.8 to 3.25 at.% were grown by RF magnetron co-sputtering. The films are nanocrystalline, with wurtzite-structure grains of a typical size of 20 nm and with a preferential orientation of the c-axis perpendicular to the surface. According to the Raman spectroscopy data, Mn mostly substitutes Zn in the lattice sites. In spite of these factors, the nanostructure and the Mn(Zn) substitution, that are considered favorable for ferromagnetism in this material, both magnetic resonance and Faraday effect measurements show paramagnetic behavior of the ZnO:Mn films and the absence of ferromagnetic order at room temperature.
Publisher version
AccessOpen access
Appears in Collections:CDF - CEP - Artigos/Papers (with refereeing)
CDF - FMNC - Artigos/Papers (with refereeing)

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