تقرير
An empirical approach to measuring interface energies in mixed-phase bismuth ferrite
| العنوان: | An empirical approach to measuring interface energies in mixed-phase bismuth ferrite |
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| المؤلفون: | Burns, Stuart R., Paull, Oliver, Bulanadi, Ralph, Lau, Christie, Sando, Daniel, Gregg, J. Marty, Valanoor, Nagarajan |
| المصدر: | Phys. Rev. Materials 5, 034404 (2021) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | In complex oxide heteroepitaxy, strain engineering is a powerful tool to obtain phases in thin films that may be otherwise unstable in bulk. A successful example of this approach is mixed phase bismuth ferrite (BiFeO3) epitaxial thin films. The coexistence of a tetragonal-like (T-like) matrix and rhombohedral-like (R-like) striations provides an enhanced electromechanical response, along with other attractive functional behaviors. In this paper, we compare the energetics associated with two thickness dependent strain relaxation mechanisms in this system: domain walls arising from monoclinic distortion in the T-like phase, and the interphase boundary between the host T-like matrix and tilted R-like phases. Combining x-ray diffraction measurements with scanning probe microscopy, we extract quantitative values using an empirical energy balance approach. The domain wall and phase boundary energies are found to be 113 $\pm$ 21 and 426 $\pm$ 23 mJ.m$^{-2}$, respectively. These numerical estimates will help us realize designer phase boundaries in multiferroics, which possess colossal responses to external stimuli, attractive for a diverse range of functional applications. Comment: 21 pages, 5 figures. Submitted to Phys. Rev. Mater |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevMaterials.5.034404 |
| URL الوصول: | http://arxiv.org/abs/2101.04883 |
| رقم الأكسشن: | edsarx.2101.04883 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevMaterials.5.034404 |
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