Abstract

We report that ``ferroelectric relaxor'' behavior is induced by doping Bi in quantum paraelectric ${\mathrm{SrTiO}}_{3},$ and doping Ce in typical ferroelectric ${\mathrm{BaTiO}}_{3}.$ The present results show that the ``ferroelectric relaxor'' state may exist no matter whether the matrix is ferroelectric or paraelectric, however, the relaxor behavior is the dynamic response of the polar clusters induced in the system.

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