Pyroelectricity in Highly Stressed Quasi-Amorphous Thin Films

Authors


  • The authors wish to acknowledge the Israel Science Foundation and US-Israel Binational Science Foundation for funding this research. I.Z. thanks the Israeli Ministry of the Immigrant Absorption for partial support. A.T. acknowledges support of INTAS project 01-0818. We express our deepest appreciation to Prof. Oscar M. Stafsudd of UCLA and to Prof. Darrell Schlom of Penn State University for very fruitful discussions.

Abstract

Quasi-amorphous BaTiO3 thin films (see Figure) represent a polar ionic solid without spatial periodicity. Most probably, polarity of the quasi-amorphous BaTiO3 is associated with directional ordering of crystal motifs formed in the steep temperature gradient and stabilized by high in-plane mechanical stress. A remarkable characteristic of quasi-amorphous BaTiO3 is expression of strong pyro- and piezoelectric effects in a low dielectric constant material.

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