| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Robust and Tunable Ferroelectricity in Ba/Co Codoped (K$_{0.5}$Na$_{0.5}$)NbO$_{3}$ Ceramics |
| Jiaxun Liu1†, Jielin Zha1†, Yulong Yang1, Xiaomei Lu1,2*, Xueli Hu1, Shuo Yan1, Zijing Wu1, and Fengzhen Huang1,2* |
1National Laboratory of Solid State Microstructures and School of Physics, Nanjing University, Nanjing 210093, China
2Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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| Cite this article: |
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Jiaxun Liu, Jielin Zha, Yulong Yang et al 2024 Chin. Phys. Lett. 41 077701 |
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Abstract The 0.98(K$_{0.5}$Na$_{0.5})$NbO$_{3}$-0.02Ba(Nb$_{0.5}$Co$_{0.5})$O$_{3-\delta}$ ceramics with doped Ba$^{2+}$ and Co$^{2+}$ ions are fabricated, and the impacts of the thermal process are studied. Compared with the rapidly cooled (RC) sample, the slowly cooled (SC) sample possesses superior dielectric and ferroelectric properties, and an 11 K higher ferroelectric-paraelectric phase transition temperature, which can be attributed to the structural characteristics such as the grain size and the degree of anisotropy. Heat treatment can reversibly modulate the content of the oxygen vacancies, and in turn the ferroelectric hysteresis loops of the samples. Finally, robust and tunable ferroelectric property is achieved in SC samples with good structural integrity.
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Received: 11 January 2024
Published: 18 July 2024
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| PACS: |
77.22.-d
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(Dielectric properties of solids and liquids)
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77.22.Ej
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(Polarization and depolarization)
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77.22.Gm
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(Dielectric loss and relaxation)
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