TY - JOUR
T1 - Z2 Vortex-Induced Broadening of the EPR Linewidth in the Two-Dimensional Triangular Lattice Antiferromagnets, HCrO2 and LiCrO2
AU - Ajiro, Yoshitami
AU - Kikuchi, Hikomitsu
AU - Sugiyama, Shu Ichiro
AU - Nakashima, Takeshi
AU - Shamoto, Shin Ichi
AU - Nakayama, Noriaki
AU - Kiyama, Masao
AU - Yamamoto, Naoichi
AU - Oka, Yoshio
N1 - Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 1988
Y1 - 1988
N2 - 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.
AB - 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.
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U2 - 10.1143/JPSJ.57.2268
DO - 10.1143/JPSJ.57.2268
M3 - Article
AN - SCOPUS:0000153250
VL - 57
SP - 2268
EP - 2271
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 7
ER -