Abstract
Sr2Ta2O7 and Sr2(Ta, Nb)2O7 thin films were prepared from molecular structure-controled alkoxide solutions. The Sr2Ta2O7 thin films initiated to crystallize at around 650 °C and showed random orientation. The surface topography developed was dependent on the solutions. In the thin films prepared from the ethanolic solution, grains formed at low temperatures. However, many small pores still remained and no grains were observed in the thin films prepared from the methoxyethanolic solution. In contrast, the 800 °C-annealed Sr2(Ta, Nb)2O7 thin films showed the (0 k 0) orientation as in Sr2Nb2O7 thin films. The dielectric constants and loss factors of the 750 °C-annealed Sr2Ta2O7 and Sr2(Ta0.7Nb0.3)2O7 thin films were around 90 and less than 0.05 at 100 kHz, respectively.
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N. NAKAO, T. NAKAMURA, A. KAMISAWA and H. TAKASU, Integr. Ferroelectr. 6 (1995) 23.
T. NAKAMURA, N. NAKAO, A. KAMISAWA and H. TAKASU, ibid. 9 (1995) 179.
Y. FUJIMORI, N. IZUMI, T. NAKAMURA, A. KAMISAWA and Y. SHIGEMATSU, Jpn. J. Appl. Phys., Part 1 36 (1997) 5935.
Y. FUJIMORI, T. NAKAMURA and A. KAMISAWA, ibid. 38 (1999) 2285.
C. H. SON, H. D. NAM, S. W. JANG and H. Y. LEE, J. Korean Phys. Soc. 32 (1998) 1434.
K. OKUWADA, S. NAKAMURA and H. NOZAWA, J. Mater. Res. 14 (1999) 855.
M. SHOYAMA, A. TSUZUKI, K. KATO and N. MURAYAMA, Appl. Phys. Lett. 75 (1999) 561.
M. SHOYAMA, A. TSUZUKI, K. KATO and N. MURAYAMA, Integr. Ferroelectr. 25 (1999) 195–203.
S. NANAMATSU, M. KIMURA and T. KANAMURA, J. Phys. Soc. Jpn. 38 (1975) 817.
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Kato, K. Surface morphology and dielectric properties of alkoxy-derived Sr2Ta2O7 and Sr2Ta, Nb2O7 thin films. Journal of Materials Science: Materials in Electronics 11, 575–578 (2000). https://doi.org/10.1023/A:1008928909648
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DOI: https://doi.org/10.1023/A:1008928909648