High-energy resolution inelastic neutron scattering experiment on magnetic fracton dispersion in near-percolating three-dimensional Heisenberg antiferromagnet, RbMnMgF

Ito, Shinichi*; Kajimoto, Ryoichi; Adams, M. A.*

Journal of the Physical Society of Japan, 74(1), p.279 - 282, 2005/01

https://doi.org/10.1143/JPSJ.74.279

Magnetic fractons in the near-percolating three-dimensional (3D) Heisenberg antiferromagnet, RbMnMgF, have been studied using inelastic neutron scattering with high energy resolution (eV) and at low temperature ( K). It is demonstrated that the fractons follow the dispersion relation of (q being the wave number). The observed exponent, , is in good agreement with the fractal dimension of the 3D system (), as predicted by theory.