Crossover from Homogeneous to Fractal Excitations in the Near-Percolating Heisenberg Antiferromagnet RbMn0.39Mg0.61F3

Hironobu Ikeda; Shinichi Itoh; Mark A. Adams; Jaime A. Fernandez-Baca

doi:10.1143/JPSJ.67.3376

Crossover from Homogeneous to Fractal Excitations in the Near-Percolating Heisenberg Antiferromagnet RbMn_0.39Mg_0.61F₃

Hironobu Ikeda, Shinichi Itoh, Mark A. Adams, Jaime A. Fernandez-Baca

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Abstract

Neutron inelastic scattering experiments on the near-percolating Hesisenberg antiferromagnet, RbMn_0.39Mg_0.61F₃, were performed using a high energy-resolution spectrometer (15 μeV). The results reveal a crossover from magnon excitations at small wave-vectors to over-damped fracton excitations at large wave-vectors. This evinces experimentally that the atomic connectivity in an infinite percolating network looks homogeneous at wave-vectors smaller than a crossover wave-vector, as predicted by the theory.

Original language	English
Pages (from-to)	3376-3379
Number of pages	4
Journal	Journal of the Physical Society of Japan
Volume	67
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.67.3376
State	Published - Oct 1998

Keywords

Fractal
Fracton
Inelastic neutron scattering
Magnetic excitation
Magnon
Percolating magnet

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10.1143/JPSJ.67.3376

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title = "Crossover from Homogeneous to Fractal Excitations in the Near-Percolating Heisenberg Antiferromagnet RbMn0.39Mg0.61F3",

abstract = "Neutron inelastic scattering experiments on the near-percolating Hesisenberg antiferromagnet, RbMn0.39Mg0.61F3, were performed using a high energy-resolution spectrometer (15 μeV). The results reveal a crossover from magnon excitations at small wave-vectors to over-damped fracton excitations at large wave-vectors. This evinces experimentally that the atomic connectivity in an infinite percolating network looks homogeneous at wave-vectors smaller than a crossover wave-vector, as predicted by the theory.",

keywords = "Fractal, Fracton, Inelastic neutron scattering, Magnetic excitation, Magnon, Percolating magnet",

author = "Hironobu Ikeda and Shinichi Itoh and Adams, {Mark A.} and Fernandez-Baca, {Jaime A.}",

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T1 - Crossover from Homogeneous to Fractal Excitations in the Near-Percolating Heisenberg Antiferromagnet RbMn0.39Mg0.61F3

AU - Ikeda, Hironobu

AU - Itoh, Shinichi

AU - Adams, Mark A.

AU - Fernandez-Baca, Jaime A.

PY - 1998/10

Y1 - 1998/10

N2 - Neutron inelastic scattering experiments on the near-percolating Hesisenberg antiferromagnet, RbMn0.39Mg0.61F3, were performed using a high energy-resolution spectrometer (15 μeV). The results reveal a crossover from magnon excitations at small wave-vectors to over-damped fracton excitations at large wave-vectors. This evinces experimentally that the atomic connectivity in an infinite percolating network looks homogeneous at wave-vectors smaller than a crossover wave-vector, as predicted by the theory.

AB - Neutron inelastic scattering experiments on the near-percolating Hesisenberg antiferromagnet, RbMn0.39Mg0.61F3, were performed using a high energy-resolution spectrometer (15 μeV). The results reveal a crossover from magnon excitations at small wave-vectors to over-damped fracton excitations at large wave-vectors. This evinces experimentally that the atomic connectivity in an infinite percolating network looks homogeneous at wave-vectors smaller than a crossover wave-vector, as predicted by the theory.

KW - Fractal

KW - Fracton

KW - Inelastic neutron scattering

KW - Magnetic excitation

KW - Magnon

KW - Percolating magnet

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DO - 10.1143/JPSJ.67.3376

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VL - 67

SP - 3376

EP - 3379

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 10

ER -

Crossover from Homogeneous to Fractal Excitations in the Near-Percolating Heisenberg Antiferromagnet RbMn_0.39Mg_0.61F₃

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Keywords

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