Ferromagnetism in ZnO co-doped with Mn and N studied by soft x-ray magnetic circular dichroism
2011 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 99, no 13, 132508- p.Article in journal (Refereed) Published
We have investigated the electronic structure of ZnO:Mn and ZnO:Mn,N thin films using x-ray magnetic circular dichroism (XMCD) and resonance-photoemission spectroscopy. From the Mn 2p -> 3d XMCD results, it is shown that, while XMCD signals only due to paramagnetic Mn(2+) ions were observed in ZnO:Mn, nonmagnetic, paramagnetic, and ferromagnetic Mn(2+) ions coexist in ZnO:Mn,N. XMCD signals of ZnO:Mn,N revealed that the localized Mn(2+) ground state and Mn(2+) state hybridized with ligand hole coexisted, implying p-d exchange coupling. In the valence-band spectra, spectral weight near the Fermi level was suppressed, suggesting that interaction between magnetic moments in ZnO:Mn,N has localized nature.
Place, publisher, year, edition, pages
2011. Vol. 99, no 13, 132508- p.
circular dichroism, exchange interactions (electron), Fermi level, ferromagnetic materials, ground states, II-VI semiconductors, localised states, magnetic moments, magnetic thin films, manganese, nitrogen, paramagnetic materials, photoelectron spectra, semiconductor thin films, valence bands, zinc compounds
IdentifiersURN: urn:nbn:se:kth:diva-47993DOI: 10.1063/1.3643044ISI: 000295618000048ScopusID: 2-s2.0-80053485452OAI: oai:DiVA.org:kth-47993DiVA: diva2:456881
QC 201111162011-11-162011-11-152011-11-16Bibliographically approved