Epitaxial growth of tungsten bronze (Sr,Ba)Nb/sub 2/O/sub 6/ thin films by chemical solution deposition

Abstract

Epitaxial growth feature of ferroelectric Sr/sub 0.5/Ba/sub 0.5/Nb/sub 2/O/sub 6/ (SBN) thin films synthesized by chemical solution deposition was investigated by enhanced XRD analyses. SBN thin films on MgO [100] crystallized to a mixture of end members SrNb/sub 2/O/sub 6/ and BaNb/sub 2/O/sub 6/ at 700/spl deg/C (heating rate: 10/spl deg/C). The sintering at over 1000/spl deg/C (heating rate: 10/spl deg/C) or at 700/spl deg/C (heating rate: 1/spl deg/C) was necessary in order to obtain the tetragonal tungsten bronze phase SBN. Two crystal lattice planes of [001]- and [310]-oriented SBN were intergrown an orientation of /spl plusmn/18.5/spl deg/ and 0/spl deg/ (90/spl deg/), respectively.