Critical slowing down mechanism and reentrant dipole glass phenomena in (1-x)BaTiO3xBiScO3 (0.1≤x≤0.4): The high energy density dielectrics

S. S.N. Bharadwaja, J. R. Kim, H. Ogihara, L. E. Cross, S. Trolier-Mckinstry, C. A. Randall

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The dielectric and ferroelectric switching properties of high temperature-high energy density (1-x)BaTiO3-xBiScO3 (0.1≤x≤0.4) dielectrics were investigated over a broad temperature range. It was found that these ceramics possess dipole glass features such as critical slowing down of the dielectric relaxation, polarization hysteresis aging, rejuvenation, and holelike memory below the dipole glass transition temperature (TDG). The dielectric relaxation behavior is consistent with a three-dimensional Ising model with critical slowing exponents (zυ)=10±1 and composition-dependent glass transition temperatures. At lower temperatures, (1-x)BaTiO3-xBiScO3 ceramics transform into a reentrant dipole glass state owing to the breakup of local polar ordering. A phase diagram is developed marking the paraelectric, ferroelectric, and dipole glass regimes as a function of composition with the reentrant features.

Original languageEnglish (US)
Article number024106
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
StatePublished - Jan 28 2011


All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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