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arXiv · 1012.4588

Antiferromagnetic resonance in ferroborate NdFe$_3$(BO$_3$)$_4

M. I. Kobets·K. G. Dergachev·E. N. Khatsko·S. L. Gnatchenko·L. N. Bezmaternykh·V. L. Temerov
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Abstract

The AFMR spectra of the NdFe$_3$(BO$_3$)$_4$ crystal are measured in a wide range of frequencies and temperatures. It is found that by the type of magnetic anisotropy the compound is an "easy-plane" antiferromagnet with a weak anisotropy in the basal plane. The effective magnetic parameters are determined: anisotropy fields $H_{a1}$=1.14 kOe and $H_{a2}$=60 kOe and magnetic excitation gaps $Δν_1$=101.9 GHz and $Δν_2$=23.8 GHz. It is shown that commensurate-incommensurate phase transition causes a shift in resonance field and a considerable change in absorption line width. At temperatures below 4.2 K nonlinear regimes of AFMR excitation at low microwave power levels are observed.

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M. I. Kobets, K. G. Dergachev, E. N. Khatsko, S. L. Gnatchenko, L. N. Bezmaternykh, V. L. Temerov. 2010-12-21. Antiferromagnetic resonance in ferroborate NdFe$_3$(BO$_3$)$_4. https://doi.org/10.1016/j.physb.2011.06.014

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