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Phase transition and chemical order in the ferroelectric perovskite (1-x)Bi(Mg3/4W1/4)O3–xPbTiO3 solid solution system

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5 Author(s)
Stringer, C.J. ; Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802 ; Eitel, R.E. ; Shrout, T.R. ; Randall, C.A.
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Building on the ferroelectric family based on the Bi(Me+3)O3PbTiO3 solid solutions, the complex solid solution (1-x)Bi(Mg3/4W1/4)O3–xPbTiO3 [(1-x)BMW–xPT] was investigated. This system was found to exhibit a broad morphotropic phase boundary at x∼0.48 mol % PbTiO3 with a corresponding Curie temperature of 205 °C separating pseudocubic and tetragonal ferroelectric phases. Based on dielectric, x-ray diffraction (XRD), and calorimetric data, a simple dielectric phase field diagram was established. On further structural analysis with diffraction contrast transmission electron microscopy along with XRD, evidence of B-site chemical ordering was found for the (1-x)Bi(MeMe)O3–xPbTiO3 perovskite family.

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Journal of Applied Physics  (Volume:97 ,  Issue: 2 )