Please use this identifier to cite or link to this item: http://hdl.handle.net/10995/103221
Title: Lattice dynamics and spontaneous magnetodielectric effect in ilmenite CoTiO3
Authors: Dubrovin, R. M.
Siverin, N. V.
Prosnikov, M. A.
Chernyshev, V. A.
Novikova, N. N.
Christianen, P. C. M.
Balbashov, A. M.
Pisarev, R. V.
Issue Date: 2021
Publisher: Elsevier Ltd
Citation: Lattice dynamics and spontaneous magnetodielectric effect in ilmenite CoTiO3 / R. M. Dubrovin, N. V. Siverin, M. A. Prosnikov, et al. — DOI 10.1016/j.jallcom.2020.157633 // Journal of Alloys and Compounds. — 2021. — Vol. 858. — 157633.
Abstract: Ilmenite-type crystals find a variety of technological applications due to their intriguing physical properties. We present the results of the lattice dynamics studies of honeycomb antiferromagnetic ilmenite CoTiO3 single crystal by the complementary polarized infrared, Raman, and dielectric spectroscopic techniques that are supplemented by the DFT calculations. The symmetries and frequencies of all predicted infrared- and Raman-active phonons were uniquely identified. Furthermore, it was found that the dielectric permittivity demonstrates distinct changes below antiferromagnetic ordering temperature in zero magnetic field due to the spontaneous magnetodielectric effect. Our results establish the solid basis for further investigations and more deep understanding of the coupling of phonons with spins and magnetic excitations, as well as their involvement in other physical phenomena in this promising material. © 2020 Elsevier B.V.
Keywords: COTIO3
DFT CALCULATIONS
DIELECTRIC SPECTROSCOPY
ILMENITE
INFRARED SPECTROSCOPY
LATTICE DYNAMICS
RAMAN SPECTROSCOPY
SINGLE CRYSTALS
COBALT COMPOUNDS
ELECTROMAGNETS
ILMENITE
LATTICE VIBRATIONS
PERMITTIVITY
PHONONS
SINGLE CRYSTALS
TITANIUM COMPOUNDS
ANTIFERROMAGNETIC ORDERING TEMPERATURE
DIELECTRIC PERMITTIVITIES
MAGNETIC EXCITATIONS
MAGNETO-DIELECTRIC EFFECTS
RAMAN-ACTIVE PHONON
SPECTROSCOPIC TECHNIQUE
TECHNOLOGICAL APPLICATIONS
ZERO MAGNETIC FIELDS
ANTIFERROMAGNETISM
URI: http://hdl.handle.net/10995/103221
Access: info:eu-repo/semantics/openAccess
SCOPUS ID: 85097762594
PURE ID: 20886236
6bd6729f-c972-41f1-b2cf-e64d83b38a0d
ISSN: 9258388
DOI: 10.1016/j.jallcom.2020.157633
metadata.dc.description.sponsorship: We thank D. A. Andronikova and M. P. Scheglov for the help with the X-ray orientation of the single crystal and K. N. Boldyrev for scientific discussion. M. A. P. acknowledges fruitful discussions with Beatrice T. Crow. R. M. D., N. V. S. and R. V. P. are grateful to Russian Science Foundation [project number 16-12-10456] for financial support. Raman spectroscopy study was supported by HFML-RU/NWO-I, a member of the European Magnetic Field Laboratory (EMFL).
RSCF project card: 16-12-10456
Appears in Collections:Научные публикации, проиндексированные в SCOPUS и WoS CC

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