Neutron study of fracton excitations in percolating antiferromagnets

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The authors report the results of an inelastic neutron scattering experiment on nearly-percolating Heisenberg antiferromagnets (RbMn{sub c}Mg{sub 1{minus}o}F{sub 3}), in which the Mn concentrations (C = 0.31, 0.34 and 0.39) are very close to the percolation threshold (c{sub p} = 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.

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8 p.

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Ikeda, H.; Takahashi, M.; Fernandez-Baca, J.A. & Nicklow, R.M. June 27, 1997.

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Description

The authors report the results of an inelastic neutron scattering experiment on nearly-percolating Heisenberg antiferromagnets (RbMn{sub c}Mg{sub 1{minus}o}F{sub 3}), in which the Mn concentrations (C = 0.31, 0.34 and 0.39) are very close to the percolation threshold (c{sub p} = 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.

Physical Description

8 p.

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OSTI as DE97008451

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  • International conference on magnetism (ICM) and symposium on strongly correlated electron systems, Cairns (Australia), 27 Jul - 1 Aug 1997

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  • Other: DE97008451
  • Report No.: CONF-970713--2
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 527517
  • Archival Resource Key: ark:/67531/metadc690509

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  • June 27, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Aug. 4, 2016, 7:03 p.m.

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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/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.