Textured Ferroelectric Materials

At present, the technologies for texturing ferroelectric materials are undergoing a rapid development, with the latest achievements in developing texture, as well as the application issues of textured materials having been the subjects of many recent... 

As with piezoelectric materials, ferroelectric materials have a variety of applications and have been intensively investigated. Again, textured crystalline thin films are likely to be needed, which implies that microstructure control is again an issue. Screening and measurement approaches are straightforward. 

The first section details the purely intrinsic response of ferroelectrics and discusses their anisotropic properties, the useful application of which can be controlled by the correct orientation of a sin e crystal or by texturing a polycrystalline material. Attention is then focused on one of the most significant extrinsic contributions to the polarization response of ferroelectrics, namely the motion of domain walls. The effect of the domain wall contribution can be controlled by the hardening-softening of... 

Single-crystal materials, however, are very expensive and in some cases impossible to fabricate. In response to this challenge, polycrystalline ferroelectrics with controlled crystallographic textures attempt to match, and in some cases overcome the limitations of their single-crystal counterparts. Figure 3 summarizes the results for two chemistries, BaTiOs and PZN-PT, as reported in [82]. Here,... 

Both, piezoelectric and pyroelectric behavior is possible only in ferroelectric ceramics, or in otherwise polar materials that are deposited as textured thin films. 

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