Magnons and crystal field transitions in hexagonal REMnO3 (RE = Er, Tm, Yb, Lu) single crystals

Abstract

Far-infrared optical transmission spectra of the antiferromagnetic resonances, or magnons, and crystal field transitions have been studied in hexagonal REMnO3 (RE = Er, Tm, Yb, Lu) single crystals. The magnon and CF frequencies, their oscillator strengths, and effective g-factors have been measured using external magnetic fields up to 9 T in the temperature range between 1.5 K and 100 K. The magnon frequency increases systematically with a decrease of the RE ion radius. The magnetic ordering of RE ions (RE=Er, Tm, Yb) was observed at low temperatures T<3.5 K and in strong external magnetic fields. The observed effects are analyzed taking into account main magnetic interactions in the system including exchange of the Mn3+ spins with RE3+ paramagnetic moments.

submitted to Phys. Rev. B 9 figures, one Table

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Cited by in corpus (8)

• Magneto- to electro-active transmutation of spin waves in ErMnO3
• Probing ultrafast spin dynamics in the antiferromagnetic multiferroic HoMnO${}_3$ through a magnon resonance
• Low-temperature heat transport and magnetic-structure transition of the hexagonal TmMnO_3 single crystals
• Asymmetric splitting of an antiferromagnetic resonance via quartic exchange interactions in multiferroic hexagonal HoMnO${}_3$
• Terahertz frequency magnetoelectric effect in Ni doped CaBaCo${}_4$O${}_7$
• Single-crystal neutron diffraction study of hexagonal YbMnO${}_3$ multiferroic under magnetic field
• Efficient spin excitation via ultrafast damping-like torques in antiferromagnets
• h-ErMnO3 absorbance, reflectivity and, emissivity in the THz to mid-infrared from 2 K to 1700 K: carrier screening, Fröhlich resonance, small polarons, and bipolarons