Crystalline Orientation of PbTiO3 Nanorods Grown by MOCVD Using ZnO Nanorods as a Template

MRS Proceedings

MRS Proceedings / Volume 1292 / 2011
Copyright © Materials Research Society 2011
DOI: http://dx.doi.org/10.1557/opl.2011.456 (About DOI)

Table of Contents - Volume 1292 - Symposium K – Oxide Nanoelectronics

Articles

Crystalline Orientation of PbTiO₃ Nanorods Grown by MOCVD Using ZnO Nanorods as a Template

2010 MRS Fall Meeting.

Article author query
fujisawa h [Google Scholar]
shimizu m [Google Scholar]
kuri r [Google Scholar]
nakashima s [Google Scholar]
kotaka y [Google Scholar]
honda k [Google Scholar]

Hironori Fujisawa^a1, Masaru Shimizu^a1, Ryohei Kuri^a1, Seiji Nakashima^a1, Yasutoshi Kotaka^a2 and Koichiro Honda^a2

^a1Graduate School of Engineering, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2201, Japan

^a2Fujitsu Laboratories Ltd., 10-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0197, Japan

ABSTRACT

PbTiO₃-covered ZnO nanorods were grown on Al₂O₃ $\left({11\bar 20} \right)$ by metalorganic chemical vapor deposition (MOCVD), and their crystalline orientation was investigated by x-ray diffraction (XRD). Structural analysis by scanning electron microscopy and XRD revealed that the hexagonal ZnO nanorods had $\left\{ {10\bar 10} \right\}$ -side facets. XRD analysis of PbTiO₃ thin films on ZnO $\left({10\bar 10} \right)$ /Al₂O₃ $\left({10\bar 10} \right)$ revealed that PbTiO₃ was epitaxially grown on ZnO $\left({10\bar 10} \right)$ , showing 6 variants of crystallites with the c-axis tilted either 27^o or 69^o from the surface normal to the ZnO $\left({10\bar 10} \right)$ plane. Effective piezoelectric coefficients calculated for the 27^o and 69^o-crystallites using piezoresponse force microscopy confirm that deformation of nanorods and nanotubes contributed to the large electrically-induced strain along the radial direction.

Key Words:

ferroelectric;
chemical vapor deposition (CVD) (deposition);
nanostructure

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