Skip to main content Accessibility help
×
Home

Dielectric and Optical Properties of Perovskite-type Artificial Superlattices

  • Takakiyo Harigai (a1), Song-Min Nam (a1), Hirofumi Kakemoto (a1), Satoshi Wada (a1), Keisuke Saito (a2) and Takaaki Tsurumi (a1)...

Abstract

BaTiO3/SrTiO3, BaTiO3/BaZrO3, and SrZrO3/SrTiO3 artificial superlattices were fabricated on SrTiO3 substrates by the molecular beam epitaxy (MBE) process. The stacking periodicity of each layer was varied from 1 unit cell to 40 unit cells, and the total thickness was fixed at 80 unit cells. In-situ reflection high-energy electron diffraction (RHEED) and x-ray diffraction (XRD) clearly shows the formation of the superlattice structure. Their lattice parameters obtained from the reciprocal space mapping measurement indicated that the lattice distortion was dependent on the stacking periodicity. The capacitance and the complex admittance of the superlattices were measured with interdigital electrodes by an impedance analyzer up to 110 MHz. It was found that the dielectric permittivity changed with the superlattice periodicity. The Q-V measurement results showed clear hysteresis curves and this suggested that ferroelectricity was induced into the SrZrO3/SrTiO3 superlattices despite a combination between paraelectrics/paraelectrics.

Copyright

References

Hide All
1. Iijima, K., Terashima, T., Bando, Y., Kamigai, K., and Terauchi, H., J. Appl. Phys. 72, 2840 (1992).
2. Tsurumi, T., Suzuki, T., Yamane, M., and Daimon, M., Jpn. J. Appl. Phys., Part 1 33, 5192 (1994).
3. Tsurumi, T., Miyasou, T., Ishibashi, Y., and Ohashi, N., Jpn. J. Appl. Phys., Part 1 37, 5104 (1998).
4. Tabata, H., Tanaka, H., and Kawai, T., Appl. Phys. Lett. 65, 1970 (1994).
5. Tsurumi, T., Ichikawa, T., Harigai, T., Kakemoto, H., and Wada, S., J. Appl. Phys. 91, 2284 (2002).
6. Harigai, T., Tanaka, D., Kakemoto, H., Wada, S., and Tsurumi, T., J. Appl. Phys. 94, 7923 (2003)
7. Farnell, G., Cermak, I., Silver, P., and Wong, S., IEEE Trans. on Sonics and Ultrasonics, SU-17, 188–95(1970).
8. Abe, K., Komatsu, S., Yanase, N., Sano, K. and Kawakubo, T., Jpn. J. Appl. Phys. 36, 5575 (1997).
9. Abe, K., Yanase, N., Komatsu, S., Sano, K. and Kawakubo, T., Oyo Buturi 67, 1286 (1998) [in Japanese].
10. Kawakubo, T., Komatsu, S., Abe, K., Sano, K., Yanase, N. and Fukushima, N., Jpn. J. Appl. Phys. 37, 5108 (1998)

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed