Magnetoelectric excitations in multiferroic Ni.sub.3./sub.TeO.sub.6./sub.

0476816 - FZÚ 2018 RIV US eng J - Journal Article
Skiadopoulou, Styliani - Borodavka, Fedir - Kadlec, Christelle - Kadlec, Filip - Retuerto, M. - Deng, Z. - Greenblatt, M. - Kamba, Stanislav
Magnetoelectric excitations in multiferroic Ni₃TeO₆.
Physical Review B. Roč. 95, č. 18 (2017), 1-6, č. článku 184435. ISSN 2469-9950. E-ISSN 2469-9969
R&D Projects: GA MŠMT(CZ) LH15122; GA ČR GA15-08389S
Institutional support: RVO:68378271
Keywords : multiferroics * electromagnons * THz * Raman * IR spectroscopy
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.813, year: 2017

The spin-order-induced ferroelectric antiferromagnet Ni3TeO6 transcends the magnetoelectric performance of all other single-phase multiferroics because it exhibits nonhysteretic colossal magnetoelectric coupling [Y. S. Oh, S. Artyukhin, J. J. Yang, V. Zapf, J. W. Kim, D. Vanderbilt, and S.-W. Cheong, Nat Commun. 5, 3201 (2014)]. We investigated spin and lattice excitations in Ni3TeO6 by a combination of infrared, Raman, and THz spectroscopies. Two spin excitations (near 13 and 35 cm(-1)) were observed simultaneously in Raman and time-domain THz spectra below the Neel temperature T-N = 53 K. We propose to assign them to electromagnons, which are activated by the dynamic magnetoelectric coupling. A third magnon is seen only in the Raman spectra near 206 cm(-1).
Permanent Link: http://hdl.handle.net/11104/0273233