Lattice dynamics and spontaneous magnetodielectric effect in ilmenite CoTiO$_3$

Autor: Peter C. M. Christianen, A. M. Balbashov, N. N. Novikova, N. V. Siverin, Roman V. Pisarev, R. M. Dubrovin, V. A. Chernyshev, M. A. Prosnikov
Rok vydání: 2020
Předmět:
Phonon
Physics::Optics
02 engineering and technology
01 natural sciences
Materials Chemistry
Condensed Matter - Materials Science
Condensed matter physics
Metals and Alloys
COBALT COMPOUNDS
SINGLE CRYSTALS
PHONONS
021001 nanoscience & nanotechnology
DFT CALCULATIONS
MAGNETIC EXCITATIONS
Magnetic field
Mechanics of Materials
RAMAN SPECTROSCOPY
symbols
INFRARED SPECTROSCOPY
0210 nano-technology
LATTICE DYNAMICS
COTIO3
Materials science
ZERO MAGNETIC FIELDS
LATTICE VIBRATIONS
DIELECTRIC SPECTROSCOPY
Infrared spectroscopy
FOS: Physical sciences
PERMITTIVITY
Dielectric
ANTIFERROMAGNETIC ORDERING TEMPERATURE
TITANIUM COMPOUNDS
RAMAN-ACTIVE PHONON
010402 general chemistry
SPECTROSCOPIC TECHNIQUE
symbols.namesake
ANTIFERROMAGNETISM
Soft Condensed Matter and Nanomaterials
TECHNOLOGICAL APPLICATIONS
Antiferromagnetism
MAGNETO-DIELECTRIC EFFECTS
Spins
Mechanical Engineering
ILMENITE
Materials Science (cond-mat.mtrl-sci)
0104 chemical sciences
DIELECTRIC PERMITTIVITIES
ELECTROMAGNETS
Raman spectroscopy
Single crystal
Zdroj: Journal of Alloys and Compounds, 858, pp. 1-10
J Alloys Compd
Journal of Alloys and Compounds
Journal of Alloys and Compounds, 858, 1-10
ISSN: 0925-8388
DOI: 10.48550/arxiv.2008.05237
Popis: 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 CoTiO$_3$ single crystal by the complementary polarized infrared, Raman, and dielectric spectroscopic techniques that are supplemented by the DFT calculations. The frequencies and symmetries 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 spontaneous magnetodielectric effect. Our results establish the reliable basis for further investigation of the coupling of phonons with spins, magnetic excitations and other physical phenomena of this promising material.
Comment: 11 pages, 8 figures, 2 tables, 2 tables
Databáze: OpenAIRE
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