First-Order Spin-Reorientation Transition and Incomplete Softening of the Antiferromagnetic Resonance Mode in Multiferroic GdFe${}_3$(BO${}_3$)${}_4$

I. N. Khoroshiy, S. A. Skorobogatov, S. E. Nikitin +3

The multiferroic ferroborate GdFe${}_3$(BO${}_3$)${}_4$ with huntite-type structure exhibits magnetic ordering below T${}_N$ = 38 K and contains two magnetic subsystems associated with Gd…