Amorphous piezo- and pyroelectric phases of BaZrO3 and SrTiO3

David Ehre, Vera Lyahovitskaya, Alexander Tagantsev, Igor Lubomirsky

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43 Scopus citations


Amorphous piezo and pyroelectric phases of BaZr3 and SrTiO 3 can form quasiamorphous phases although neither of them have a polar crystalline polymorph. Amorphous films of SrTiO3 or BaZrO 3 (50- 200 nm thick) were deposited by radiofrequency magnetron sputtering on highly conductive Si substrates. The as-deposited amorphous films were then pulled through a temperature gradient in order to induce a strong inhomogeneous stress that could align the local bonding units. Stoichiometry of all samples was verified with X-ray photoelectron spectroscopy before and after heat treatment. These findings are the first instance of successful manipulation of local bonding units to obtain a noncrystalline inorganic solid with desired properties. Though qualitative, this method is highly reliable because the influences of electrical interferences, friction-induced electricity, and electrostriction can easily be excluded.

Original languageEnglish
Pages (from-to)1515-1517
Number of pages3
JournalAdvanced Materials
Issue number11
StatePublished - 4 Jun 2007
Externally publishedYes


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