Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoring
RFe2O4 is expected to deliver high-performance ferroelectricity that can reduce the fatigue associated with polarization reversal and the electric field (coercive field) required for polarization switching because its ferroelectricity originates from charge ordering. However, there have been very fe...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-03-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0259898 |
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| author | K. Shimamoto T. Hayama T. Yoshimura N. Fujimura |
| author_facet | K. Shimamoto T. Hayama T. Yoshimura N. Fujimura |
| author_sort | K. Shimamoto |
| collection | DOAJ |
| description | RFe2O4 is expected to deliver high-performance ferroelectricity that can reduce the fatigue associated with polarization reversal and the electric field (coercive field) required for polarization switching because its ferroelectricity originates from charge ordering. However, there have been very few reports on the fabrication of thin films of the material because of the severe growth condition of an extremely reduced oxygen atmosphere, even though the material is an oxide. To provide cutting-edge insights into elucidating the essential fundamental properties of thin films of RFe2O4, we developed a reproductive fabrication method to control both the phase formation and composition of YbFe2O4 epitaxial thin films. We investigated principles guiding the fabrication of the YbFe2O4 epitaxial thin films with a customized pulsed laser deposition (PLD) system. The optimal laser fluence for crystal growth was controlled by tuning the laser energy and focusing lens position, assisted by an in situ monitoring technique of the plasma plume ablated from the ceramic target with optical emission spectroscopy. A multiple-target PLD system using six varieties of ceramic targets with different crystal phases and compositions was introduced to control the Fe/Yb composition ratio of YbFe2O4 epitaxial thin films. Combining these techniques paves the way for overcoming the stoichiometric issues in this series of crystal structures toward novel device applications. |
| format | Article |
| id | doaj-art-22aa763f4b5044f486bd0a85759282fc |
| institution | OA Journals |
| issn | 2166-532X |
| language | English |
| publishDate | 2025-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj-art-22aa763f4b5044f486bd0a85759282fc2025-08-20T01:55:52ZengAIP Publishing LLCAPL Materials2166-532X2025-03-01133031109031109-610.1063/5.0259898Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoringK. Shimamoto0T. Hayama1T. Yoshimura2N. Fujimura3Department of Physics and Electronics, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, JapanDepartment of Physics and Electronics, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, JapanDepartment of Physics and Electronics, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, JapanDepartment of Physics and Electronics, Graduate School of Engineering, Osaka Metropolitan University, Sakai 599-8531, JapanRFe2O4 is expected to deliver high-performance ferroelectricity that can reduce the fatigue associated with polarization reversal and the electric field (coercive field) required for polarization switching because its ferroelectricity originates from charge ordering. However, there have been very few reports on the fabrication of thin films of the material because of the severe growth condition of an extremely reduced oxygen atmosphere, even though the material is an oxide. To provide cutting-edge insights into elucidating the essential fundamental properties of thin films of RFe2O4, we developed a reproductive fabrication method to control both the phase formation and composition of YbFe2O4 epitaxial thin films. We investigated principles guiding the fabrication of the YbFe2O4 epitaxial thin films with a customized pulsed laser deposition (PLD) system. The optimal laser fluence for crystal growth was controlled by tuning the laser energy and focusing lens position, assisted by an in situ monitoring technique of the plasma plume ablated from the ceramic target with optical emission spectroscopy. A multiple-target PLD system using six varieties of ceramic targets with different crystal phases and compositions was introduced to control the Fe/Yb composition ratio of YbFe2O4 epitaxial thin films. Combining these techniques paves the way for overcoming the stoichiometric issues in this series of crystal structures toward novel device applications.http://dx.doi.org/10.1063/5.0259898 |
| spellingShingle | K. Shimamoto T. Hayama T. Yoshimura N. Fujimura Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoring APL Materials |
| title | Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoring |
| title_full | Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoring |
| title_fullStr | Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoring |
| title_full_unstemmed | Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoring |
| title_short | Composition control of YbFe2O4 electronic ferroelectric thin films with PLD growth process monitoring |
| title_sort | composition control of ybfe2o4 electronic ferroelectric thin films with pld growth process monitoring |
| url | http://dx.doi.org/10.1063/5.0259898 |
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