期刊
PHILOSOPHICAL MAGAZINE
卷 92, 期 23, 页码 2911-2922出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/14786435.2012.682173
关键词
cuprate superconductors; micromechanics; nanocomposites; nanostructured thin films; strain; structural transitions; YBCO
类别
资金
- NSF
- ARO [NSF-DMR-0803149, NSF-DMR-1105986, NSF EPSCoR-0903806, ARO-W911NF-0910295]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [803149] Funding Source: National Science Foundation
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1105986] Funding Source: National Science Foundation
A micromechanical model based on the theory of elasticity has been developed to study the configuration of self-assembled secondary phase oxide nanostructures in high-temperature superconducting YBa2Cu3O7-delta films. With the calculated equilibrium strain and elastic energy of the impurity doped film, a phase diagram of lattice mismatches vs. elastic constants of the dopant was obtained that predicts the energetically preferred orientation of secondary phase nanorods. The calculation of the nanorod orientation and the film lattice deformation has yielded excellent agreement with experimental measurements.
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