Spin dynamics of two dimensional triangular lattice antiferromagnet 3R-AgFeO2статья
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Дата последнего поиска статьи во внешних источниках: 4 сентября 2019 г.
Аннотация:Spin dynamics of quasi two-dimensional (2D) triangular-lattice antiferromagnetdelafossite3R-AgFeO2 have been investigated by electron spin resonance. The divergence of the temperature dependent linewidth have been analyzed in the frame of two possible scenarios: (i) critical broadening due to slowing down of spins on approaching the Néel temperature TN from above and (ii) in terms of a Berezinskii-Kosterlitz-Thouless (BKT) formalism on triangular lattice due to magnetic Z2-vortex-antivortex pairing. It has been found that the latter model gives better description of the experimental data indicating traces of Z2-vortices formation.