Magnons and crystal-field transitions in hexagonal RMnO 3 (R = Er, Tm, Yb, Lu) single crystals

Document Type

Article

Publication Date

4-23-2012

Abstract

Far-infrared optical transmission spectra of the antiferromagnetic resonances, or magnons, and crystal-field (CF) transitions have been studied in hexagonal RMnO 3 (R = 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 and 100 K. The magnon frequency increases systematically with a decrease of the R ion radius. The magnetic ordering of R ions (R = 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 the main magnetic interactions in the system including exchange of the Mn3 + spins with R3 + paramagnetic moments. © 2012 American Physical Society.

Identifier

84860296138 (Scopus)

Publication Title

Physical Review B Condensed Matter and Materials Physics

External Full Text Location

https://doi.org/10.1103/PhysRevB.85.144422

e-ISSN

1550235X

ISSN

10980121

Issue

14

Volume

85

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