dc.contributor.author | Sildos, I. | |
dc.contributor.author | Puust, L. | |
dc.contributor.author | Grabis, J. | |
dc.contributor.author | Mironova-Ulmane, Nina | |
dc.contributor.author | Kuzmin, Alexei | |
dc.date.accessioned | 2020-08-19T17:58:50Z | |
dc.date.available | 2020-08-19T17:58:50Z | |
dc.date.issued | 2019 | |
dc.identifier.issn | 0868-8257 | |
dc.identifier.uri | https://dspace.lu.lv/dspace/handle/7/52448 | |
dc.description.abstract | Single-crystal, microcrystalline and nanocrystalline nickel oxides (NiO) have been studied by Raman spectroscopy. A new band at ~200 cm-1 and TO-LO splitting of the band at 350–650 cm-1 have been found in the spectra of single-crystals NiO(100), NiO(110) and NiO(111). The Raman spectra of microcrystalline (1500 nm) and nanocrystalline (13–100 nm) NiO resemble those of the single crystals. They all contain the two-magnon band at 1500 cm-1, indicating that the oxides remain at room temperature in the antiferromagnetic
phase. Besides, a new sharp Raman band has been observed at 500 cm-1 in
nanocrystalline NiO. Its temperature dependence suggests the magnetic origin
of the band, possibly associated with the one-phonon–one-magnon excitation
at the Brillouin zone centre. | en_US |
dc.description.sponsorship | Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART² | en_US |
dc.language.iso | eng | en_US |
dc.publisher | Sciendo | en_US |
dc.relation | info:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART² | en_US |
dc.relation.ispartofseries | Latvian Journal of Physics and Technical Sciences;56 (2) | |
dc.rights | info:eu-repo/semantics/openAccess | en_US |
dc.subject | lattice dynamics | en_US |
dc.subject | magnons | en_US |
dc.subject | nickel oxide | en_US |
dc.subject | nanoparticles | en_US |
dc.subject | Raman spectroscopy | en_US |
dc.subject | Research Subject Categories::NATURAL SCIENCES:Physics | en_US |
dc.title | Magnon and Phonon Excitations in Nanosized NiO | en_US |
dc.type | info:eu-repo/semantics/article | en_US |
dc.identifier.doi | 10.2478/lpts-2019-0014 | |