Equilibrium Random-Field Ising Critical Scattering in the Antiferromagnet Fe{sub 0.93}Zn{sub 0.07}F{sub 2}

Journal Article · Fri Jan 01 04:00:00 EST 1999 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.82.426· OSTI ID:289132

Slanic, Z; Belanger, D P ^[1]; Fernandez-Baca, J A ^[2]

---

1. Department of Physics, University of California, Santa Cruz, California 95064 (United States)
2. Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393 (United States)

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 T{sub c}(H) because of severe nonequilibrium effects. The high magnetic concentration Ising antiferromagnet Fe{sub 0.93} Zn{sub 0.07} F{sub 2} , however, does provide equilibrium behavior. We have employed scaling techniques to extract the universal equilibrium scattering line shape, critical exponents {nu}=0.87{plus_minus}0.07 and {eta}=0.20{plus_minus}0.05 , and amplitude ratios of this RFIM system. {copyright} {ital 1999} {ital The American Physical Society }

• Research Organization: Oak Ridge National Laboratory
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 289132
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 2 Vol. 82; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
ANTIFERROMAGNETIC MATERIALS
HFIR REACTOR
IRON FLUORIDES
ISING MODEL
NEUTRON DIFFRACTION
ORDER-DISORDER TRANSFORMATIONS
RANDOMNESS
SCALING LAWS
ZINC ADDITIONS