TY - JOUR
T1 - Spin disorder and order in quasi-2D triangular heisenberg antiferromagnets
T2 - Comparative study of FeGa2S4, Fe2Ga2S5, and NiGa2S4
AU - Nakatsuji, S.
AU - Tonomura, H.
AU - Onuma, K.
AU - Nambu, Y.
AU - Sakai, O.
AU - Maeno, Y.
AU - MacAluso, R. T.
AU - Chan, Julia Y.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2007/10/11
Y1 - 2007/10/11
N2 - Our single crystal study reveals that the single-layer S=2 triangular Heisenberg antiferromagnet FeGa2S4 forms a frozen spin-disordered state, similar to the S=1 isostructural magnet NiGa2S4. In this state, the magnetic specific heat CM is not only insensitive to the field, but shows a T2 dependence that scales to CM of NiGa2S4, suggesting the same underlying mechanism of the 2D coherent behavior. In contrast, the bilayer system Fe2Ga2S5 exhibits a 3D antiferromagnetic order.
AB - Our single crystal study reveals that the single-layer S=2 triangular Heisenberg antiferromagnet FeGa2S4 forms a frozen spin-disordered state, similar to the S=1 isostructural magnet NiGa2S4. In this state, the magnetic specific heat CM is not only insensitive to the field, but shows a T2 dependence that scales to CM of NiGa2S4, suggesting the same underlying mechanism of the 2D coherent behavior. In contrast, the bilayer system Fe2Ga2S5 exhibits a 3D antiferromagnetic order.
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U2 - 10.1103/PhysRevLett.99.157203
DO - 10.1103/PhysRevLett.99.157203
M3 - Article
AN - SCOPUS:35348895536
VL - 99
JO - Physical Review Letters
JF - Physical Review Letters
SN - 0031-9007
IS - 15
M1 - 157203
ER -