Physics – Condensed Matter – Materials Science
Scientific paper
2012-02-26
Physics
Condensed Matter
Materials Science
submitted to Phys. Rev. B 9 figures, one Table
Scientific paper
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.
Cheong Sang-Wook
Lee Namkyung
Sirenko A. A.
Standard E. C.
Stanislavchuk T.
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