Neutron study of fracton excitations in percolating antiferromagnets

H. Ikeda; M. Takahashi; J. A. Fernandez-Baca; R. M. Nicklow

doi:10.1016/S0304-8853(97)00334-X

Neutron study of fracton excitations in percolating antiferromagnets

H. Ikeda, M. Takahashi, J. A. Fernandez-Baca, R. M. Nicklow

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Abstract

We report the results of an inelastic neutron scattering experiment on nearly percolating Heisenberg antiferromagnets (RbMn_cMg_1-cF₃), in which the Mn concentrations (c = 0.31, 0.34 and 0.39) are very close to the percolation threshold (c_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.

Original language	English
Pages (from-to)	139-140
Number of pages	2
Journal	Journal of Magnetism and Magnetic Materials
Volume	177-181
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0304-8853(97)00334-X
State	Published - Jan 1998

Funding

This study was partially supported by the USqapan Collaborative Program on Neutron Scattering. Work High Energy Accelerator Research Organization (KEK) was supported by a Grant-in-Aid for Scientific Research from the Japanese Ministry of Education, Science, Sports and Culture. Work at ORNL was supported by the Division of Materials Sciences, US Department of Energy, under contract DE-AC05-96OR22464 with Lockheed Martin Energy Research Corp.

Keywords

Excitations
Fractals
Magnetic excitations
Neutron scattering
Percolation

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abstract = "We report the results of an inelastic neutron scattering experiment on nearly percolating Heisenberg antiferromagnets (RbMncMg1-cF3), 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.",

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T1 - Neutron study of fracton excitations in percolating antiferromagnets

AU - Ikeda, H.

AU - Takahashi, M.

AU - Fernandez-Baca, J. A.

AU - Nicklow, R. M.

PY - 1998/1

Y1 - 1998/1

N2 - We report the results of an inelastic neutron scattering experiment on nearly percolating Heisenberg antiferromagnets (RbMncMg1-cF3), 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.

AB - We report the results of an inelastic neutron scattering experiment on nearly percolating Heisenberg antiferromagnets (RbMncMg1-cF3), 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.

KW - Excitations

KW - Fractals

KW - Magnetic excitations

KW - Neutron scattering

KW - Percolation

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DO - 10.1016/S0304-8853(97)00334-X

M3 - Article

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SN - 0304-8853

VL - 177-181

SP - 139

EP - 140

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - PART 1

ER -

Neutron study of fracton excitations in percolating antiferromagnets

Abstract

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Keywords

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