Fig. 2: Re-entrant phase diagram of the ferroelectric BT-5Bi-xSn and the ferromagnetic Fe-xAu [refs. 24, 25], where TB, TC, Tm, and Trg denote the Burns temperature, Curie temperature, dielectric maximum temperature of the relaxor, and re-entrant glass transition temperature, respectively. | NPG Asia Materials

Fig. 2: Re-entrant phase diagram of the ferroelectric BT-5Bi-xSn and the ferromagnetic Fe-xAu [refs. 24, 25], where TB, TC, Tm, and Trg denote the Burns temperature, Curie temperature, dielectric maximum temperature of the relaxor, and re-entrant glass transition temperature, respectively.

From: Re-entrant relaxor–ferroelectric composite showing exceptional electromechanical properties

Fig. 2: Re-entrant phase diagram of the ferroelectric BT-5Bi-xSn and the ferromagnetic Fe-xAu [refs. 24, 25], where TB, TC, Tm, and Trg denote the Burns temperature, Curie temperature, dielectric maximum temperature of the relaxor, and re-entrant glass transition temperature, respectively.

a-b At a low concentration of Sn/Au, the ferroelectric/ferromagnetic transition occurs, whereas the corresponding relaxor/cluster spin glass transition appears at a high concentration. The coexistence of the glass and ferroelectric/ferromagnetic states at the intermediate concentration stems from the re-entrant transition. A unique state (see below) forms at the critical composition (indicated by the dashed red arrow)

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