Multiple dielectric transitions in the PbTiO3-Bi(Zn 1/2Ti1/2)O3-Bi(Mg1/2Ti 1/2)O3 system

David M. Stein, Ilya Grinberg, Andrew M. Rappe, Peter K. Davies

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Abstract

The ternary perovskite system PbTiO3-Bi(Zn1/2Ti 1/2)O3-Bi(Mg1/2Ti1/2)O3 was investigated in an attempt to capture the enhanced tetragonality of the PbTiO3-Bi(Zn1/2Ti1/2)O3 binary system at a morphotropic phase boundary (MPB) to improve piezoelectric performance. Results from the (1-x)[0.75 PbTiO3-0.25Bi(Zn 1/2Ti1/2)O3]-(x)Bi(Mg1/2Ti 1/2)O3 pseudo-binary solution indicate the formation of an MPB-type phase boundary with a high TC (585 C at x 0.55). Multiple dielectric transitions were observed in a region of the ternary diagram characterized by high occupancy of the A-site by Bi3+ (>40) and the B-site by ferroelectrically active cations (>70). Temperature-dependent diffraction studies revealed the persistence of a tetragonal structure in at least a subset of the crystal to the higher temperature dielectric transition.

Original languageEnglish
Article number074110
JournalJournal of Applied Physics
Volume110
Issue number7
DOIs
StatePublished - 1 Oct 2011
Externally publishedYes

Bibliographical note

Funding Information:
D.M.S. and P.K.D. were supported by the Office of Naval Research (ONR) through Grant No. N00014-09-1-0455. I.G. and A.M.R. were supported by the Office of Naval Research (ONR) under grant N00014-09-1-0157.

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