We investigate the magnetic properties of the multiferroic quantum-spin system LiCu2O2 by electron spin resonance (ESR) measurements at X- and Q-band frequencies in a wide temperature range (TN1≤T≤300\,K). The observed anisotropies of the g tensor and the ESR linewidth in untwinned single crystals result from the crystal-electric field and from local exchange geometries acting on the magnetic Cu2+ ions in the zigzag-ladder like structure of LiCu2O2. Supported by a microscopic analysis of the exchange paths involved, we show that both the symmetric anisotropic exchange interaction and the antisymmetric Dzyaloshinskii-Moriya interaction provide the dominant spin-spin relaxation channels in this material.
@article{arxiv.1705.01324,
title = {Anisotropic Exchange in ${\bf LiCu_2O_2}$},
author = {Zakir Seidov and Tatiana P. Gavrilova and Rushana M. Eremina and Leonid E. Svistov and Alexander A. Bush and Alois Loidl and Hans-Albrecht Krug von Nidda},
journal= {arXiv preprint arXiv:1705.01324},
year = {2017}
}