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21 Jan 2002

Volume 80, Issue 3, pp. 341-531

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Large remanent polarization and coercive force by 100% 180° domain switching in epitaxial Pb(Zr0.5Ti0.5)O3 capacitor

Junichi Ishida, Takatoshi Yamada, Atsuhito Sawabe, Kumi Okuwada, and Keisuke Saito

Appl. Phys. Lett. 80, 467 (2002); http://dx.doi.org/10.1063/1.1433912 (3 pages) | Cited 14 times

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Pb(Zr0.5Ti0.5)O3 (PZT) thin film was heteroepitaxially grown on an iridium/magnesium oxide (Ir/MgO) (001) substrate using the metalo-organic decomposition method, and its crystal orientation and ferroelectric properties were investigated. The Ir film by rf-magnetron sputtering on a MgO single crystal showed high crystallinity with the full width at half maximum of 0.2°. The obtained PZT film has a tetragonal structure. Reciprocal space mapping revealed that it consisted of only c-axis orientation. The Ir/PZT/Ir capacitor showed the remanent polarization of 45 μ C/cm2 and a coercive force of 100 kV/cm. These large values were derived from 100% 180° domain switching, which state is difficult to realize in bulky single crystal and ceramics because of piezostress relaxation. © 2002 American Institute of Physics.
Show PACS
77.84.Ek Niobates and tantalates
77.84.Cg PZT ceramics and other titanates
77.55.-g Dielectric thin films
77.22.Ej Polarization and depolarization
68.55.-a Thin film structure and morphology
77.80.Fm Switching phenomena
85.50.Gk Non-volatile ferroelectric memories

Local electric-field-driven repoling reflected in the ferroelectric polarization of Ce-doped Sr0.61Ba0.39Nb2O6

T. Granzow, U. Dörfler, Th. Woike, M. Wöhlecke, R. Pankrath, M. Imlau, and W. Kleemann

Appl. Phys. Lett. 80, 470 (2002); http://dx.doi.org/10.1063/1.1435403 (3 pages) | Cited 15 times

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We present pyroelectric measurements with the relaxor-ferroelectric strontium barium niobate in the phase transition regime. It is demonstrated that domains poled at high temperatures are more stable than those oriented at room temperature. This yields a higher phase-transition temperature when heating the sample and a strong repoling during the cooling process. We explain this difference within the framework of the random field model for relaxor ferroelectrics. © 2002 American Institute of Physics.
Show PACS
77.84.Ek Niobates and tantalates
77.84.Cg PZT ceramics and other titanates
77.22.Ej Polarization and depolarization
77.70.+a Pyroelectric and electrocaloric effects
77.80.B- Phase transitions and Curie point
77.80.Dj Domain structure; hysteresis
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