Magnetic resonances of multiferroic TbFe3(BO3)4

Dávid Szaller, Vilmos Kocsis, Sándor Bordács, T. Fehér, Toomas Rõõm, Urmas Nagel, Hans Engelkamp, Kenya Ohgushi, István Kézsmárki

Research output: Contribution to journalArticle

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Abstract

Low-energy magnetic excitations of the easy-axis antiferromagnet TbFe3(BO3)4 are investigated by far-infrared absorption and reflection spectroscopy in high magnetic fields up to 30 T. The observed field dependence of the resonance frequencies and the magnetization are reproduced by a mean-field spin model for magnetic fields applied both along and perpendicular to the easy axis. Based on this model we determined the full set of magnetic interactions, including Fe-Fe and Fe-Tb exchange interactions, single-ion anisotropy for Tb ions and g factors, which describe the ground-state spin texture and the low-energy spin excitations of TbFe3(BO3)4. Compared to earlier studies, we allow a small canting of the nearly Ising-type Tb moments to achieve a quantitative agreement with the magnetic susceptibility measurements. The additional high-energy magnetic resonance lines observed, besides the two resonances expected for a two-sublattice antiferromagnet, suggest a more complex six-sublattice magnetic ground state for TbFe3(BO3)4.

Original languageEnglish
Article number024427
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume95
Issue number2
DOIs
Publication statusPublished - Jan 24 2017

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Magnetic resonance
Ground state
magnetic resonance
Ions
Magnetic fields
sublattices
Exchange interactions
Infrared absorption
Magnetic susceptibility
Magnetization
Anisotropy
ground state
Textures
Spectroscopy
resonance lines
magnetic fields
infrared absorption
excitation
energy
absorption spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Szaller, D., Kocsis, V., Bordács, S., Fehér, T., Rõõm, T., Nagel, U., ... Kézsmárki, I. (2017). Magnetic resonances of multiferroic TbFe3(BO3)4. Physical Review B - Condensed Matter and Materials Physics, 95(2), [024427]. https://doi.org/10.1103/PhysRevB.95.024427

Magnetic resonances of multiferroic TbFe3(BO3)4. / Szaller, Dávid; Kocsis, Vilmos; Bordács, Sándor; Fehér, T.; Rõõm, Toomas; Nagel, Urmas; Engelkamp, Hans; Ohgushi, Kenya; Kézsmárki, István.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 95, No. 2, 024427, 24.01.2017.

Research output: Contribution to journalArticle

Szaller, D, Kocsis, V, Bordács, S, Fehér, T, Rõõm, T, Nagel, U, Engelkamp, H, Ohgushi, K & Kézsmárki, I 2017, 'Magnetic resonances of multiferroic TbFe3(BO3)4', Physical Review B - Condensed Matter and Materials Physics, vol. 95, no. 2, 024427. https://doi.org/10.1103/PhysRevB.95.024427
Szaller, Dávid ; Kocsis, Vilmos ; Bordács, Sándor ; Fehér, T. ; Rõõm, Toomas ; Nagel, Urmas ; Engelkamp, Hans ; Ohgushi, Kenya ; Kézsmárki, István. / Magnetic resonances of multiferroic TbFe3(BO3)4. In: Physical Review B - Condensed Matter and Materials Physics. 2017 ; Vol. 95, No. 2.
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