Magnetic vacancy percolation in dilute antiferromagnets

W. C. Barber; F. Ye; D. P. Belanger; J. A. Fernandez-Baca

doi:10.1103/PhysRevB.69.024409

Magnetic vacancy percolation in dilute antiferromagnets

W. C. Barber, F. Ye, D. P. Belanger, J. A. Fernandez-Baca

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Abstract

Neutron-scattering experiments at the magnetic vacancy percolation threshold concentration x_v using the random-field Ising crystal Fe_0.76Zn_0.24F₂, show stability of the transition to long-range order up to fields H = 6.5 T. The observation of the stable long-range order corroborates the sharp boundary observed in computer simulations at x_v separating equilibrium critical scattering behavior at high magnetic concentration from low concentration hysteretic behavior. Low-temperature H > 0 scattering line shapes exhibit the dependence on the scattering wave vector expected for percolation threshold fractal structures.

Original language	English
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	69
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.69.024409
State	Published - Jan 21 2004

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10.1103/PhysRevB.69.024409

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Magnetic vacancy percolation in dilute antiferromagnets

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