TY - JOUR
T1 - Magnetic Excitations and Spin Correlations in Two-Dimensional Percolating Ising Antiferromagnets
AU - Iwasa, Kazuaki
AU - Ikeda, Hironobu
AU - Andersen, Ken H.
AU - Eccleston, Roger S.
PY - 1996
Y1 - 1996
N2 - The magnetic excitations in two-dimensional percolating Ising-type antiferromagnets, Rb2CocMg1-cF4 (c = 0.60 and 0.70), were studied by pulsed-neutron scattering. The peaks due to Ising-cluster excitations were clearly observed far above TN. Their intensities exist even at 5TN and 2TN for c = 0-60 and 0.70, respectively. This reveals that the characteristic time of the spin correlation in percolating networks is much longer than that of neutrons traveling through the systems, and, therefore, the spins can provide molecular fields at the neighboring sites, even in paramagnetic regions.
AB - The magnetic excitations in two-dimensional percolating Ising-type antiferromagnets, Rb2CocMg1-cF4 (c = 0.60 and 0.70), were studied by pulsed-neutron scattering. The peaks due to Ising-cluster excitations were clearly observed far above TN. Their intensities exist even at 5TN and 2TN for c = 0-60 and 0.70, respectively. This reveals that the characteristic time of the spin correlation in percolating networks is much longer than that of neutrons traveling through the systems, and, therefore, the spins can provide molecular fields at the neighboring sites, even in paramagnetic regions.
KW - Fractal
KW - Ising-cluster excitation
KW - Neutron scattering
KW - Spin correlation
KW - Two-dimensional percolating ising antiferromagnet
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U2 - 10.1143/JPSJ.65.1038
DO - 10.1143/JPSJ.65.1038
M3 - Article
AN - SCOPUS:0030537263
VL - 65
SP - 1038
EP - 1042
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 4
ER -