## Abstract

We have performed neutron scattering experiments to investigate the static magnetic structure and the magnetic critical scattering in the three-dimensional percolating Heisenberg antiferromagnet, RbMn_{0.31} Mg_{0.69} F_{3}, whose magnetic concentration is just at the percolation concentration for a cubic lattice, c_{P} = 0.312. Magnetic scattering was observed around the superlattice point, (frac(1, 2), frac(1, 2), frac(1, 2)). We determined the Néel temperature of this system to be T_{N} = 4.0 ± 0.5 K, and found that the critical scattering above T_{N} is similar to that observed in the homogeneous system. At T = 1.6 K well below T_{N}, the scattering function is described by a sum of the critical scattering and elastic scattering components, and we demonstrated that the q-variation of the intensity of the elastic scattering component can be described using the fractal dimension.

Original language | English |
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Pages (from-to) | 441-443 |

Number of pages | 3 |

Journal | Physica B: Condensed Matter |

Volume | 385-386 I |

DOIs | |

Publication status | Published - 2006 Nov 27 |

## Keywords

- Fractal
- Magnetic phase transition
- Neutron scattering

## ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering