Phys. Rev. Lett. 82, 426–429 (1999)Equilibrium Random-Field Ising Critical Scattering in the Antiferromagnet Fe0.93Zn0.07F2Received 1 September 1998; published in the issue dated 11 January 1999 It has long been believed that equilibrium random-field Ising model (RFIM) critical scattering studies are not feasible in dilute antiferromagnets close to and below Tc(H) because of severe nonequilibrium effects. The high magnetic concentration Ising antiferromagnet Fe0.93Zn0.07F2, however, does provide equilibrium behavior. We have employed scaling techniques to extract the universal equilibrium scattering line shape, critical exponents ν = 0.87±0.07 and η = 0.20±0.05, and amplitude ratios of this RFIM system. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.426
DOI:
10.1103/PhysRevLett.82.426
PACS:
75.40.Cx, 61.12.-q, 75.10.Nr
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