Diffuse scattering and image contrast of tweed in superconducting oxides: A simulation and interpretation
Monte Carlo simulations were performed with a lattice gas model which represents the interactions between oxygen atoms in YBa[sub 2](Cu[sub 1-x]M[sub x])[sub 3]O[sub 7+[delta]] (M=Fe, Co, or Al, 0.03< [times] <0.l) system. The amplitudes of concentration waves/displacement waves obtained from these simulations then were used to calculate the intensity of the diffuse scattering of tweed seen in the electron diffraction pattern. The characteristic features of the tweed image were produced by calculation, using a model based on the contrast originating from structures with displacive modulation, stacking on the top of each other. Both calculations agree well with the TEM observations and provide an useful basis for a better insight into the origin of the tweed structure.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6206435
- Report Number(s):
- BNL-48498; CONF-9301114--1; ON: DE93016131
- Country of Publication:
- United States
- Language:
- English
Similar Records
Twin and tweed microstructures in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] doped by trivalent cations
Superstructures and ordering phenomena in ceramic superconductors
Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COBALT COMPOUNDS
COBALT OXIDES
COPPER COMPOUNDS
COPPER OXIDES
DOMAIN STRUCTURE
ELECTRON MICROSCOPY
HIGH-TC SUPERCONDUCTORS
IMAGES
IRON COMPOUNDS
IRON OXIDES
MICROSCOPY
MODULATION
OXIDES
OXYGEN COMPOUNDS
SIMULATION
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
TRANSMISSION ELECTRON MICROSCOPY
YTTRIUM COMPOUNDS
YTTRIUM OXIDES