Fractal structure and critical scattering in the three-dimensional percolating antiferromagnet, RbMn0.31 Mg0.69 F3

S. Itoh, R. Kajimoto, K. Iwasa, N. Aso, M. J. Bull, M. A. Adams, T. Takeuchi, H. Yoshizawa

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

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, RbMn0.31 Mg0.69 F3, whose magnetic concentration is just at the percolation concentration for a cubic lattice, cP = 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 TN = 4.0 ± 0.5 K, and found that the critical scattering above TN is similar to that observed in the homogeneous system. At T = 1.6 K well below TN, 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 languageEnglish
Pages (from-to)441-443
Number of pages3
JournalPhysica B: Condensed Matter
Volume385-386 I
DOIs
Publication statusPublished - 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

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