Improvement of ferroelectric fatigue endurance in multiferroic (Ba(0.5)Sr(0.5))TiO(3)/(Bi(1.05)La(0.05))FeO(3)/(Ba(0.5)Sr(0.5))TiO(3) sandwich structures
We report the improved ferroelectric properties in dielectric/multiferroic/dielectric sandwich structures composed of Ba(0.5)Sr(0.5)TiO(3) (BST) and Bi(1.05)La(0.05)FeO(3) (BLF). Compared with the single BLF film, the trilayer structures exhibit a lower dielectric loss and weaker frequency dependenc...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en |
| Published: |
AIP Publishing
2008
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/8224/1/Miao-2008-Improvement_of_ferro.pdf http://eprints.um.edu.my/8224/ http://apl.aip.org/resource/1/applab/v92/i6/p062902_s1 |
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| Summary: | We report the improved ferroelectric properties in dielectric/multiferroic/dielectric sandwich structures composed of Ba(0.5)Sr(0.5)TiO(3) (BST) and Bi(1.05)La(0.05)FeO(3) (BLF). Compared with the single BLF film, the trilayer structures exhibit a lower dielectric loss and weaker frequency dependence of dielectric properties. At room temperature, the remnant polarization and saturation polarization of the trilayer structures are 34.3 and 46.9 mu C/cm(2), respectively. More interestingly, the polarization of BST/BLF/BST trilayer exhibits a fatigue-free characteristic of up to 10(9) switching cycles. Applying Dawber's model, the concentration of oxygen vacancies and barrier energy of oxygen vacancies migration in BST/BLF/BST trilayer are calculated as 6.1x10(17) cm(-3) and 1.33 eV, respectively. (C) 2008 American Institute of Physics. |
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