Perovskite phase stabilization in epitaxial Pb(Mg(sub 1/3}Nb{sub 2/3})O{sub 3}-PbTiO{sub 3} films by deposition onto vicinal (001) SrTiO{sub 3} substrates.
We report the perovskite phase stabilization of 0.67Pb(Mg{sub 1/3}Nb{sub 2/3})O3-0.33PbTiO{sub 3} (PMN-PT) epitaxial thin films by deposition onto miscut substrates. Films were grown on (001) SrTiO{sub 3} substrates with miscut angles from 0 to 8 degrees toward the [100] direction using 90 degree off-axis magnetron sputtering. Films on high miscut substrates (>4 ) showed almost the pure perovskite phase in both x-ray diffraction and transmission electron microscopy image, and were nearly stoichiometric. In contrast, films on exact (001) SrTiO{sub 3} contained a high volume fraction of pyrochlore phases with Pb deficiency. Atomic force microscopy reveals that films on 8 miscut substrates have a much smoother surface morphology than those on exact (001) SrTiO{sub 3}. Cross-sectional transmission electron microscopy images reveal that the pyrochlore phases nucleate on top of the perovskite phase, and that the amount of the pyrochlore phases increase with film thickness. A film on an 8 miscut substrate exhibits a polarization hysteresis loop with a remnent polarization of 20 {mu}C/cm2 at room temperature.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); USDOD
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 949436
- Report Number(s):
- ANL/MSD/JA-40905; APPLAB; TRN: US1003532
- Journal Information:
- Appl. Phys. Lett., Vol. 79, Issue 21 ; Nov. 19, 2001; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- ENGLISH
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