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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.11763 |
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| _version_ | 1866913393667997696 |
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| author | Beechem, Thomas E Vega, Fernando Jaszewski, Samantha T. Aronson, Benjamin L. Kelley, Kyle P. Ihlefeld, Jon F. |
| author_facet | Beechem, Thomas E Vega, Fernando Jaszewski, Samantha T. Aronson, Benjamin L. Kelley, Kyle P. Ihlefeld, Jon F. |
| contents | Photoinduced reductions in the oxygen vacancy concentration were leveraged to increase the ferroelectric phase fraction of $\mathrm{Hf_{0.5}Zr_{0.5}O_2}$ (HZO) thin-films. Modest ($\sim 0.02-0.77~\mathrm{mJ/μm^2}$) laser doses of visible light (488 nm, 2.54 eV) spatially patterned the concentration of oxygen vacancies as monitored by photoluminescence imaging. Local, tip-based, near-field, nanoFTIR measurements showed that the photoinduced oxygen vacancy concentration reduction promoted formation of the ferroelectric phase (space group $Pca2_1$) resulting in an increase in the piezoelectric response measured by piezoresponse force microscopy. Photoinduced vacancy tailoring provides, therefore, a spatially prescriptive, post-synthesis, and low-entry method to modify phase in \hfo-based materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_11763 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photoinduced Patterning of Oxygen Vacancies to Promote the Ferroelectric Phase of $\mathrm{Hf_{0.5}Zr_{0.5}O_2}$ Beechem, Thomas E Vega, Fernando Jaszewski, Samantha T. Aronson, Benjamin L. Kelley, Kyle P. Ihlefeld, Jon F. Materials Science Mesoscale and Nanoscale Physics Photoinduced reductions in the oxygen vacancy concentration were leveraged to increase the ferroelectric phase fraction of $\mathrm{Hf_{0.5}Zr_{0.5}O_2}$ (HZO) thin-films. Modest ($\sim 0.02-0.77~\mathrm{mJ/μm^2}$) laser doses of visible light (488 nm, 2.54 eV) spatially patterned the concentration of oxygen vacancies as monitored by photoluminescence imaging. Local, tip-based, near-field, nanoFTIR measurements showed that the photoinduced oxygen vacancy concentration reduction promoted formation of the ferroelectric phase (space group $Pca2_1$) resulting in an increase in the piezoelectric response measured by piezoresponse force microscopy. Photoinduced vacancy tailoring provides, therefore, a spatially prescriptive, post-synthesis, and low-entry method to modify phase in \hfo-based materials. |
| title | Photoinduced Patterning of Oxygen Vacancies to Promote the Ferroelectric Phase of $\mathrm{Hf_{0.5}Zr_{0.5}O_2}$ |
| topic | Materials Science Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2406.11763 |