Research Updates: Epitaxial strain relaxation and associated interfacial reconstructions: The driving force for creating new structures with integrated functionality
Abstract
Here, we report detailed strain mapping analysis at heterointerfaces of a new multiferroic complex oxide Bi3Fe2Mn2Ox(BFMO322) supercell and related layered structures. The state-of-the-art aberration corrected scanning transmission electron microscopy (Cs-corrected STEM) and the modified geometric phase analysis (GPA) have been used to characterize the self-assembled transitional layers, misfit defects, and, in particular, the biaxial lattice strain distributions. We found that not only a sufficient lattice misfit is required through substrate selection and to be preserved in initial coherent epilayer growth, but also an appropriate interfacial reconstruction is crucial for triggering the growth of the new BFMO322 supercell structure. The observation of new transitional interfacial phases behaving like coherent film layers within the critical thickness challenges the conventional understanding in existing epitaxial growth model.
Department
Electrical and Computer EngineeringCollections
Citation
Zhu, Yuanyuan; Chen, Aiping; Zhou, Honghui; Zhang, Wenrui; Narayan, Jagdish; MacManus-Driscoll, Judith L.; Jia, Quanxi; Wang, Haiyan (2013). Research Updates: Epitaxial strain relaxation and associated interfacial reconstructions: The driving force for creating new structures with integrated functionality. AIP Publishing LLC. Available electronically from http : / /dx .doi .org /10 .1063 /1 .4828936.
The following license files are associated with this item: