This article is cited in 2 papers

Dielectrics

Evolution of heterophase structures and elastic effects in twinned crystals (Bi$_{1-z}$Pb$_z$)FeO$_3$ (0 $\le z\le$ 0.100)

V. Yu. Topolov

Southern Federal University, Rostov-on-Don

Abstract: The specific features of the phase coexistence in crystals of (Bi$_{1-z}$Pb$_z$)FeO$_3$ multiferroic solid solutions with a significantly distorted perovskite unit cell below the Curie temperature $T_{\mathrm{C}}$ have been investigated. Some examples of the evolution of the $Pm3m$–$R3c$, $R3c$–$C2/m$, and $R3c$–$Pbnm$ heterophase structures and different scenarios of mechanical stress relaxation in the presence of several types of twin domains of the $R3c$ phase have been analyzed. The $Pm\bar3m$–$R3c$ heterophase structures in the temperature intervals [$T_{\mathrm{C}}$ – 150 K; $T_{\mathrm{C}}$] ($z$ = 0.025) and [$T_{\mathrm{C}}$ – 185 K; $T_{\mathrm{C}}$] ($z$ = 0.050) have been interpreted. The results have been systematized using the diagrams relating twin structures and phase boundaries at 0 $\le z\le$ 0.100.

Received: 17.03.2011

 English version: Physics of the Solid State, 2012, 54:3, 478–484

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