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Order Parameter Criticality of the d=3 Random-Field Ising Antiferromagnet Fe(0.85)Zn(0.15)F2

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arxiv cond-mat/0202300 v3 pith:WFFEVA4D submitted 2002-02-18 cond-mat.dis-nn

F. Ye , L. Zhou , S. Larochelle , L. Lu , D.P. Belanger , M. Greven , D. Lederman This is my paper · ORCID
classification cond-mat.dis-nn
keywords random-fieldcriticalisingmagneticorderparameterantiferromagnetbeta
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The critical exponent beta =0.16 +- 0.02 for the random-field Ising model order parameter is determined using extinction-free magnetic x-ray scattering for Fe(0.85)Zn(0.15)F2 in magnetic fields of 10 and 11 T. The observed value is consistent with other experimental random-field critical exponents, but disagrees sharply with Monte Carlo and exact ground state calculations on finite-sized systems.

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