Experimental study of the critical scattering from a two-dimensional random Ising antiferromagnet
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
The magnetic critical fluctuations in the d = 2 random-exchange antiferromagnet Rb/sub 2/Co/sub 0.7/Mg/sub 0.3/F/sub 4/ have been studied by neutron diffraction at temperatures both above and below the Neel temperature T/sub N/ = 40.8 K. At temperatures above T/sub N/, the line shape of the critical scattering is well described by the Lorentzian form, and the critical exponents ..nu.. and ..gamma.. for the inverse correlation length kappa/sup +/ = kappa/sub 0//sup +/chemically bondtchemically bond/sup ..nu../ and the staggered susceptibility chi/sup +/ = C/sub 0//sup +/chemically bondtchemically bond/sup -//sup ..gamma../ are in good agreement with the values for the pure d = 2 Ising model.
- Research Organization:
- Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831
- OSTI ID:
- 6045820
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:1; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETIC MATERIALS
COBALT COMPOUNDS
COBALT FLUORIDES
COHERENT SCATTERING
CRYSTAL MODELS
DATA
DIFFRACTION
EXCHANGE INTERACTIONS
EXPERIMENTAL DATA
FLUCTUATIONS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
INTERACTIONS
ISING MODEL
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
MATHEMATICAL MODELS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
NUMERICAL DATA
PHYSICAL PROPERTIES
RANDOMNESS
RUBIDIUM COMPOUNDS
RUBIDIUM FLUORIDES
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VARIATIONS
VERY LOW TEMPERATURE
360603* -- Materials-- Properties
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ANTIFERROMAGNETIC MATERIALS
COBALT COMPOUNDS
COBALT FLUORIDES
COHERENT SCATTERING
CRYSTAL MODELS
DATA
DIFFRACTION
EXCHANGE INTERACTIONS
EXPERIMENTAL DATA
FLUCTUATIONS
FLUORIDES
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
INFORMATION
INTERACTIONS
ISING MODEL
MAGNESIUM COMPOUNDS
MAGNESIUM FLUORIDES
MAGNETIC MATERIALS
MAGNETIC PROPERTIES
MATERIALS
MATHEMATICAL MODELS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
NUMERICAL DATA
PHYSICAL PROPERTIES
RANDOMNESS
RUBIDIUM COMPOUNDS
RUBIDIUM FLUORIDES
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VARIATIONS
VERY LOW TEMPERATURE