Spin and lattice vibrations of CaMn7O12 in the THz range

Author

Kadlec, Filip ; Goian, Veronica ; Kadlec, Christelle ; Kempa, Martin ; Rols, Stephane ; Taylor, James ; Orlita, Milan ; Kamba, S.

Author_Institution

Inst. of Phys., Prague, Czech Republic

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

We studied meV-range excitations in the CaMn₇O₁₂ multiferroic which exhibits a high ferroelectric polarization. In infrared, THz and neutron scattering spectra, we observed spin waves far above the Néel temperature. We denote these as paraelectromagnons and explain their presence by strong short-range magnetic correlations.

Keywords

calcium compounds; ferroelectric materials; infrared spectra; lattice dynamics; manganese compounds; multiferroics; neutron spectra; terahertz wave spectra; CaMn₇O₁₂; Néel temperature; THz range; THz scattering spectra; high ferroelectric polarization; infrared scattering spectra; lattice vibrations; meV-range excitations; neutron scattering spectra; paraelectromagnons; short-range magnetic correlations; spin vibrations; Extraterrestrial measurements; Magnetic domains; Magnetic hysteresis; Magnetoelectric effects; Magnetostriction; Neutron spin echo; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956339

Filename

6956339