0000000001059556

AUTHOR

Martti Pärs

showing 2 related works from this author

Polarisation dependent Raman study of single-crystal nickel oxide

2011

Abstract The magnetic domain structure and Raman scattering have been studied in NiO single-crystals with three different (100), (110) and (111) orientations. Twin-domain structure was observed in NiO(100) and NiO(110) single-crystals using cross-polarized optical microscopy. We found that the ratio of the two-magnon (at 1500 cm−1) to the two-phonon (2LO, at 1100 cm−1) Raman bands intensity is sensitive in a particular way to the type of the twin-domain pattern.

antiferromagnetic domainsMaterials scienceMagnetic domainNickel oxidePhysicsQC1-999Non-blocking I/OAnalytical chemistryGeneral Physics and Astronomyniomagnonslaw.inventionsymbols.namesakeX-ray Raman scatteringNuclear magnetic resonanceOptical microscopelawsymbolsRaman spectroscopyraman scatteringSingle crystalRaman scatteringOpen Physics
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Raman scattering in nanosized nickel oxide NiO

2007

Magnetic ordering in nanosized (100 and 1500 nm) nickel oxide NiO powders, prepared by the plasma synthesis method, was studied using Raman scattering spectroscopy in a wide range of temperatures from 10 to 300 K. It was observed that the intensity of two- magnon band decreases rapidly for smaller crystallites size. This effect is attributed to a decrease of antiferromagnetic spin correlations and leads to the antiferromagnetic-to- paramagnetic phase transition .

HistoryPhase transitionMaterials scienceNickel oxideMagnonNon-blocking I/OInorganic chemistryAnalytical chemistryComputer Science ApplicationsEducationCondensed Matter::Materials ScienceParamagnetismsymbols.namesakesymbolsAntiferromagnetismCondensed Matter::Strongly Correlated ElectronsCrystalliteRaman scatteringJournal of Physics: Conference Series
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