Neutron study of fracton excitations in percolating antiferromagnets Page: 1 of 9
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Neutron study of fracton excitations in percolating antiferromagnets
H.Ikeda (a), M.Takahashi (b), J.A.Fernandez-Baca (c), R.M.Nicklow(c)
(a) National Laboratory for High Energy Physics, Tsukuba 305, Japan
(b) Institute of Applied Physics, Tsukuba University, Tshukuba 305, Japan
(c) Oak Ridge National Laboratory, Oak Ridge, TN37831, USA
We report the results of an inelastic neutron scattering experiment on
nearly-percolating Heisenberg antiferromagnets (RbMncMgi-_F3), in which the
Mn concentrations (c=0.31, 0.34 and 0.39) are very close to the percolation
threshold (cp =0.312). A broad peak superimposed on Ising-cluster excitations
was observed throughout the Brillouin zone. The intensity of a broad peak
increased on approaching the percolation threshold. The origin of this broad
peak is attributed to the excitation of fractons in a percolating network.
Fractals, Magnetic excitations, Neutron scattering - excitations,
Percolation A R
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Ikeda, H.; Takahashi, M.; Fernandez-Baca, J.A. & Nicklow, R.M. Neutron study of fracton excitations in percolating antiferromagnets, article, June 27, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc690509/m1/1/: accessed September 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.