Diffuse scattering and image contrast of tweed in superconducting oxides: A simulation and interpretation
Conference
·
OSTI ID:10166087
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:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10166087
- Report Number(s):
- BNL--48498; CONF-9301114--1; ON: DE93016131
- Country of Publication:
- United States
- Language:
- English
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