Magnetic order in the random-field Ising film Fe{sub 0.52}Zn{sub 0.48}F{sub 2}
Journal Article
·
· Physical Review, B: Condensed Matter
- Department of Physics, University of California, Santa Cruz, California 95064 (United States)
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- Hughes Research Laboratories, 3011 Malibu Canyon Road, Malibu, California 90265 (United States)
- Centro Atomico Bariloche, 8400 Bariloche, Rio Negro (Argentina)
- Department of Physics, University of California, San Diego, La Jolla, California 92093-0319 (United States)
The extinction-free neutron scattering for a 3.4 {mu}m epitaxial film of the dilute antiferromagnet Fe{sub 0.52}Zn{sub 0.48}F{sub 2} has been studied near the (100) antiferromagnetic Bragg point. For the {ital H}=0 Bragg scattering we observe the random-exchange Ising model behavior {ital I}{approximately}{vert_bar}{ital t}{vert_bar}{sup 2{beta}} with {beta}=0.35. For 0{lt}{ital H}{le}4.5 T the random-field Ising peak intensity vs{ital T} has the opposite curvature from the {ital H}=0 case near {ital T}{sub {ital c}}({ital H}). We argue that this has to do with the formation of two weakly interacting, interpenetrating, antiferromagnetically ordered domains with interfaces primarily falling on vacancy sites. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Oak Ridge National Laboratory
- DOE Contract Number:
- AC05-84OR21400; FG03-87ER45324
- OSTI ID:
- 286676
- Journal Information:
- Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 5 Vol. 54; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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