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arXiv 1202.5803cond-mat.mtrl-scicond-mat.str-el
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六方晶系REMnO3(RE = Er,Tm,Yb,Lu)单晶中的磁振子和晶场跃迁

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

E. C. Standard, T. Stanislavchuk, A. A. Sirenko, N. Lee, S. -W. Cheong

摘要:

本文研究了六方REMnO_3(RE = Er,Tm,Yb,Lu)单晶的反铁磁共振(或称磁振子)和晶场跃迁的远红外光学透射谱。在1.5 ~ 100 K温度范围内,用高达9 T的外加磁场测量了磁振子和CF频率、振子强度和有效g因子。磁振子频率随稀土离子半径的减小而系统地增加。在低温T<3.5 K和强磁场中观察到稀土离子(RE=Er,Tm,Yb)的磁有序。考虑到系统中的主要磁相互作用,包括交换的Mn 3+自旋与RE 3+的顺磁矩所观察到的效果进行了分析。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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