Amorphous Piezo- and Pyroelectric Phases of BaZrO3 and SrTiO3


  • The authors wish to acknowledge the Minerva Foundation and the Israel Science Foundation for funding this research. The authors also received support from the collaborative linkage grant of the NATO program for Security through Science. The authors express their appreciation to Prof. Oscar Stafsudd of UCLA for assistance with the pyroelectric-effect measurements and to Prof. Eric Cross of Penn State University for a very fruitful discussion. Supporting Information is available online from Wiley InterScience or from the author.


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Pyro- and piezoelectric quasiamorphous thin films of BaZrO3and SrTiO3 are reported. This is the first instance of a polar amorphous solid being created from a compound that does not from polar crystalline polymorphs. The pyroelectric and the piezoelectric properties of the quasi-amorphous SrTiO3 are of the same order of magnitude (10–50 %) as those of the most commonly used crystalline pyro- and piezo-electric materials, such as BaTiO3, Pb(Ti,Zr)O3, and LiNbO3 (see figure).