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Lattice dynamics and spontaneous magnetodielectric effect in ilmenite CoTiO$_3$ | | R. M. Dubrovin
; N. V. Siverin
; M. A. Prosnikov
; V. A. Chernyshev
; N. N. Novikova
; P. C. M. Christianen
; A. M. Balbashov
; R. V. Pisarev
; | | Date: |
12 Aug 2020 | | 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 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. | | Source: | arXiv, 2008.05237 | | Services: | Forum | Review | PDF | Favorites | |
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