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Ferroelectric perovskite-type barium copper niobate: BaCu1/3Nb2/3O3 |
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| Authors: | W Zhang Y Yonesaki N Kinomura M Azuma |
| Institution: | a Department of Research Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi Miyamae-cho 7, Kofu, Yamanashi, 400-8511, Japan b Shonan Institute of Technology, Tsujidonishikaigan1-1-25, Fujisawa, Kanagawa, 251-8511, Japan c Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan |
| Abstract: | A perovskite-type BaCu1/3Nb2/3O3 was prepared by high temperature reaction using BaCO3, CuO and Nb2O5. The X-ray powder diffraction pattern of this compound was indexed with the tetragonal cell with the lattice parameters of a=4.0464(4) and c=4.1807(4) Å (c/a=1.033). This compound had the tetragonal perovskite-type structure in which the B site was occupied statistically by Nb and Cu atoms. From high temperature X-ray powder diffraction patterns this compound had a phase transition from the tetragonal to cubic symmetry in the temperature range of 500-600 °C. The P-E and S-E hysteresis loops occurred at room temperature and the apparent maximum in the temperature dependence of the dielectric constant was observed at 520 °C. The temperature dependence of the inverse of magnetic susceptibility exhibited paramagnetic behavior. |
| Keywords: | Ferroelectric Perovskite-type Oxide |
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