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

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 $\Delta {\nu }_1$=101.9 GHz and $\Delta {\nu }_2$=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.

References in corpus (2)

• Single magnetic chirality in the magneto-electric NdFe${}_3$(${}^{11}$BO${}_3$)${}_4$
• Simultaneous Antiferromagnetic Fe3+ and Nd3+ Ordering in NdFe3(11BO3)4