Low Temperature Physics: 42, 543 (2016); https://doi.org/10.1063/1.4959010
Fizika Nizkikh Temperatur: Volume 42, Number 7 (July 2016), p. 694-698    ( to contents , go back )

UV-VUV synchrotron radiation spectroscopy of NiWO4

A. Kuzmin1, V. Pankratov1,2, A. Kalinko1,3, A. Kotlov3, L. Shirmane1, and A.I. Popov1

1Institute of Solid State Physics, University of Latvia, 8 Kengaraga str., LV-1063 Riga, Latvia
E-mail: a.kuzmin@cfi.lu.lv

2Research Center of Molecular Materials, University of Oulu, P.O. Box 3000, FIN-90014, Finland

3DESY Photon Science, Notkestraße 85, D-22607 Hamburg, Germany
pos Анотація:

Received January 18, 2016


Photoluminescence and excitation spectra of microcrystalline and nanocrystalline nickel tungstate (NiWO4) were measured using UV-VUV synchrotron radiation source. The origin of the bands is interpreted using comparative analysis with isostructural ZnWO4 tungstate and based on the results of recent first-principles band structure calculations. The influence of the local atomic structure relaxation and of Ni2+ intra-ion d–d transitionson the photoluminescence band intensity are discussed.

PACS: 78.55.Hx Other solid inorganic materials;
PACS: 61.05.cj Electron density of states and band structure of crystalline solids;
PACS: 71.20.–b X-ray absorption spectroscopy: EXAFS, NEXAFS, XANES, etc.

Key words: NiWO4, ZnWO4, UV-VUV spectroscopy, EXAFS, first-principles calculations.

Published online: May 25, 2016

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