期刊
APPLIED PHYSICS LETTERS
卷 98, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3535981
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资金
- Korean government (MEST) [2009-0077249, 2009-0080567, 2010-0020416]
- Army Research Office [W911NF-10-1-0362]
- National Research Foundation of Korea [2009-0077249] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Epitaxial (001) BiFeO3 thin films grown on vicinal SrTiO3 substrates are under large anisotropic stress from the substrates. The variations of the crystallographic tilt angle and the c lattice constant, caused by the lattice mismatch, along the film thickness were analyzed quantitatively using the x-ray diffraction technique. By generalizing the Nagai model, we estimated how step bunching resulted in the vertical lattice mismatch between adjacent BiFeO3 layers, which induced the strain relaxation and crystallographic tilt. The step bunching was confirmed by the increased terrace width on the BiFeO3 surface. (C) 2011 American Institute of Physics. [doi:10.1063/1.3535981]
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