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 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