期刊
THIN SOLID FILMS
卷 517, 期 2, 页码 506-509出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2008.06.058
关键词
Ferroelectric properties; Non-volatile memory; Pseudo-pyrochlore phase; X-ray diffraction; X-ray absorption near edge structure; Cerium titanate
类别
资金
- Korea Research Foundation
- Korean Government (MOEHRD [KRF-2006-311-D00636]
- MOST
- POSTECH
Ferroelectric Ce2Ti2O7 films were grown with a pseudo-pyrochlore structure on an Y2O3/Si substrate by low-vacuum (6.664 Pa) anneal at 800 degrees C using chemical solution deposition. Trivalent state of Ce could be confirmed by using X-ray absorption-near-edge-structure. The dielectric constant at 1 MHz and dielectric loss of the film in the Pt/Ce2Ti2O7/Pt structure were measured as 48.7 and 0.013, respectively. A relatively large memory window of 1.24 V was measured with a Pt/Ce2Ti2O7/Y2O3/Si capacitor structure at an applied voltage of 6 V. The capacitance-voltage hysteresis was symmetrical without shift from the origin due to an effective suppression of the interfacial SiO2 formation under low-vacuum annealing conditions. The Ce2Ti2O7 him was compatible for application to a ferroelectric gate. (c) 2008 Elsevier B.V. All rights reserved.
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