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Enhanced Polarization Switching Characteristics of Pb(Zr0.5Ti0.5)O3–Pt Nanocomposite Thin Films

  • Cheng-Wei Cheng (a1), Yuan-Chieh Tseng (a1), Tai-Bor Wu (a1) and Li-Jen Chou (a1)


The effect of nanoscale Pt particles embedded in ferroelectric matrix on the polarization switching characteristics of Pb(Zr0.5Ti0.5)O3 (PZT) thin films of low thickness was investigated. Two different nanocomposite structures of PZT-Pt thin films were fabricated for the study. The first one incorporated a single layer of Pt nano-particles embedded in the PZT film, which was formed by annealing an ultrathin Pt layer that had been inserted into the middle of the deposited PZT. The other one had Pt nano-particles embedded uniformly and coherently in the lattice of the PZT matrix, which was generated by annealing the cosputtered films of PZT and Pt. The electric field applied on the films can be locally intensified near the embedded Pt particles, which markedly enhances the polarization switching characteristic of the above PZT-Pt nanocomposite films. Accordingly, a satisfactorily higher remanent polarization was obtained than exhibited by normal PZT films, but the coercive field was only slightly higher. However, adding an excess of Pt made the nanocomposite films too leaky to exhibit the enhancement. Moreover, the nanocomposite PZT-Pt films in the capacitor configuration of Pt/LaNiO3/PZT-Pt/LaNiO3/Pt also exhibited highly reliable polarization retention and fatigue resistance.



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1Seike, A., Amanuma, K., Kobayashi, S., Tatsumi, T., Koike, H. and Hada, H.: Polarization reversal kinetics of a lead zirconate titanate thin-film capacitor for nonvolatile memory. J. Appl. Phys. 88, 3445 (2000).
2Liu, M., Kim, H.K. and Blachere, J.: Lead-zirconate-titanate-based metal/ferroelectric/insulator/semiconductor structure for nonvolatile memories. J. Appl. Phys. 91, 5985 (2002).
3 C.A. Paz de Araujo, O. Auciello, and R. Ramesh: in Science and Technology of Integrated Ferroelectrics: Selected Papers from Eleven Years of the Proceedings of International Symposium on Integrated Ferroelectrics, edited by Paz, C.A. de Araujo, Auciello, O., Ramesh, R., and Taylor, G.W. (Gordun and Breach Science Publishers, 2000) p. xvii.
4Ramesh, R., Aggarwal, S. and Auciello, O.: Science and technology of ferroelectric films an heterostructures for non-volatile ferroelectric memories. Mater. Sci. Eng. 32, 191 (2001).
5Mehta, R.R., Silverman, B.D. and Jacobs, J.T.: Depolarization fields in thin film ferroelectric films. J. Appl. Phys. 44, 3379 (1973).
6Tagantesv, A.K., Pawlaczyk, C., Brooks, K., Landivar, M., Colla, E. and Setter, N.: Depletion and depolarizing effects in ferroelectric thin films and their manifestations in switching and fatigue. Integr. Ferroelectr. 6, 309 (1995).
7Majumder, S.B., Roy, B. and Katiyar, R.S.: Effects of acceptor and donor dopants on polarization components of lead zirconate titanate thin films. Appl. Phys. Lett. 79, 239 (2001).
8Hirano, T., Kawai, H., Suzuki, H., Kaneko, S. and Wada, T.: Effect of excess lead addition on processing of sol-gel derived lanthanum-modified lead zirconate titanate thin film. Jpn. J. Appl. Phys. 38, 5354 (1999).
9Tabata, H. and Kawai, T.: Dielectric properties of strained (Sr,Ca)TiO3/(Ba,Sr)TiO3 artificial lattices. Appl. Phys. Lett. 70, 321 (1997).
10Marrec, F. Le, Farhi, R., El, M., Marrsi, M. El, Dellis, J.L. and Karkut, M.G.: Ferroelectric PbTiO3/BaTiO3 superlattices: Growth anomalies and confined modes. Phys. Rev. B. 61, 6448 (2000).
11Newnham, R.E., Skinner, D.P. and Cross, L.E.: Connectivity and piezoelectric-pyroelectric composites. Mater. Res. Bull. 13, 525 (1978).
12Duan, N., Elshof, J.E. and Verweij, H.: Enhancement of dielectric and ferroelectric properties by addition of Pt particles to a lead zirconate titanate matrix. Appl. Phys. Lett. 77, 3263 (2000).
13Chen, M.S., Wu, T.B. and Wu, J.M.: Effect of textured LaNiO3 electrode on the fatigue improvement of Pb(Zr0.53Ti0.47)O3 thin film. Appl. Phys. Lett. 68, 1430 (1996).
14Yang, C.C., Chen, M.S., Hong, T.J., Wu, C.M., Wu, J.M. and Wu, T.B.: Preparation of (100)-oriented metallic LaNiO3 thin films on Si substrates by radio frequency magnetron sputtering for the growth of textured Pb(Zr0.53Ti0.47)O3. Appl. Phys. Lett. 66, 2643 (1995).
15Kwok, C.K. and Desu, S.B. in Ferroelectric Thin Films II, edited by Kingon, A.I., Myers, E.R., and Tuttle, B. (Mater. Res. Soc. Symp. Proc. 243, Pittsburgh, PA, 1992) p. 393
16Yamada, T., Ueda, T., Kitayama, T.: Piezoelectric of high-content lead zirconate titanate/polymer composite. J. Appl. Phys. 53, 4328 (1982).
17Cillessen, J.F.M., Prins, M.W.J. and Wolf, R.M.: Thickness dependence of the switching voltage in all-oxide ferroelectric thin-film capacitors prepared by pulsed laser deposition. J. Appl. Phys. 81, 2777 (1997).
18Duiker, H.M., Beale, P.D., Scott, J.F., de Araujo, C.A. Paz, Melnick, B.M., Cuchiaro, J.D. and McMillam, L.D.: Fatigue and switching in ferroelectric memories: Theory and experiment. J. Appl. Phys. 68, 5783 (1990).
19Desu, S.B. and Yoo, I.K.: ISIF92 Proceedings, 640 (1992).


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Enhanced Polarization Switching Characteristics of Pb(Zr0.5Ti0.5)O3–Pt Nanocomposite Thin Films

  • Cheng-Wei Cheng (a1), Yuan-Chieh Tseng (a1), Tai-Bor Wu (a1) and Li-Jen Chou (a1)


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