Multiferroic properties of Bi1-xDyxFeO3 (x=0-0.2) ceramics at various temperatures

作者：Sun Chen; Wang Yiping; Yang Ying; Yuan Guoliang^*; Yin Jiang; Liu Zhiguo

来源：Materials Letters, 2012, 72: 160-163.

DOI：10.1016/j.matlet.2011.12.119

• BiFeO3
• Multiferroic
• Piezoelectric
• Phase transition

Insulated Bi1-xDyxFeO3 (x = 0-0.2) were prepared to study their multiferroic properties at various temperatures. Bi1-xDyxFeO3 (x = 0-0.08) shows rhombohedral phase, ferroelectric polarization of >18 mu C/cm(2), and piezoelectric d(33) value of >35 pC/N at room temperature. After the polarized ceramics were annealed at various high temperatures, the piezoelectric d(33) changes suggest that ferroelectric component exists below 700 degrees C. There are ferroelectric phase and PZT-like anti-polar orthorhombic phase together in Bi1-xDyxFeO3 (x = 0.11-0.17), although only ferroelectric phase contributes polarization and d(33) which decreases with Dy concentration at this two-phase coexistence region. Finally, Bi1-xDyxFeO3 (x = 0.2) transforms to non-polar orthorhombic phase according to structural and electric measurements.

• 出版日期2012-4-1
• 单位南京大学