Z2 Vortex-Induced Broadening of the EPR Linewidth in the Two-Dimensional Triangular Lattice Antiferromagnets, HCrO2 and LiCrO2

Yoshitami Ajiro, Hikomitsu Kikuchi, Shu Ichiro Sugiyama, Takeshi Nakashima, Shin Ichi Shamoto, Noriaki Nakayama, Masao Kiyama, Naoichi Yamamoto, Yoshio Oka

研究成果: Article同行評審

49 引文 斯高帕斯(Scopus)

摘要

The title compounds are the family of the AMO2-type (R3m) crystal which has a pronounced layer structure and are promising candidates for the two-dimensional Heisenberg triangular lattice antiferromagnet (2DH TAL-AF). The interesting observation is that a singular point of the EPR signal is located around TKM=0.66JS2 for the critical temperature of phase transition associated with the pairing-dissociation of the Z2 vortices, suggesting the present system behaves as 2DH TAL-AF down to very close to TKM. The EPR linewidth exhibits Z2 vortex-induced broadening above the critical temperature which is inversely proportional to the thermally excited vortex density, nv∝exp (–Ev/kBT) with the activation energy Ev≅4kBTKM.

原文English
頁(從 - 到)2268-2271
頁數4
期刊Journal of the Physical Society of Japan
57
發行號7
DOIs
出版狀態Published - 1988

All Science Journal Classification (ASJC) codes

  • 物理與天文學 (全部)

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