Energy Absorption from an Oscillating Magnetic Driving Field by Soliton Motions in the Quasi One-Dimensional Ferromagnet [(CH3)N4]NiCl3(TMNC)

Abstract

Experimental evidence for one-dimensional domain-wall relaxation above $T_c$ in the quasi one-dimensional ferromagnet [(C${\mathrm{H}}_3$)${}_4{}^{}{}_{}{}^{}\mathrm{N}$] Ni${\mathrm{Cl}}_3$ has been obtained from ac susceptibility measurements in the frequency range $10 \mathrm{Hz}<\nu <30\mathrm{} \mathrm{MHz}$. The field and temperature dependence of the absorption is well explained by the interaction of $\pi$ solitons with the oscillating magnetic field.