Field cycling‐induced evolution of functional properties in bismuth samarium ferrite ceramics

Abstract

The field-controlled phase transition is a promising concept for the design of novel multiferroic materials. Rare-earth samarium-modified bismuth ferrite (Bi 1−x Sm x-FeO 3 ) possesses a morphotropic phase boundary (MPB) that has similar free energies between the polar and nonpolar phases, making it an exceptional candidate. In this study, we investigated the electric field cycling-dependent behavior of ferroelectricity in Bi 1−x Sm x FeO 3 ceramics near MPB. During electric field cycling, a significantly enhanced remanent polarization was observed. Cycled Bi 0.86 Sm 0.14-FeO 3 and Bi 0.84 Sm 0.16 FeO 3 exhibited enhanced ferroelectric (remanent polarization >30 μC/cm 2 ) and magnetic (remanent magnetization >0.20 emu/g) properties at room temperature. Through a systematic study of dynamic hysteresis measurements and a structural analysis, these results were attributed to a field cycling-induced nonpolar-to-polar phase transition. In situ high temperature measurements showed a previously unreported sharp anomaly of the piezoelectric coefficient (d 33 ) near the magnetic transition point (T N ). These results indicated a strong magnetoelectric coupling in rare earth-modified bismuth ferrite materials, suggesting the possibility of magnetically modulated piezoelectricity.

Structural transition and magnetic properties of Mn doped Bi0.88Sm0.12FeO3 ceramics

“…47,48 It is known that an electric eld can induce irreversible and/ or reversible phase transitions between antipolar orthorhombic and polar rhombohedral structures. 1,3,13,49,50 Therefore, the electric eld-induced phase transformation can possibly lead a disorder of spin at the PB and leaves evidence in the magnetic hysteresis loop. And hence, in the present work, we measured the magnetic hysteresis loops before and aer applying an electric eld of 17 kV cm À1 on the samples x ¼ 0.02, 0.06, and 0.1, as shown in Fig.…”

Design of piezoelectric nanogenerator based onBiFeO3/epoxy resin with potential application for wearable electronic devices

“…It can be characterized by perovskite-type rhombohedral R3c crystal structure, 27 high Curie temperature (T c = 850 C), Nèel temperature (T N = 370 C), 25,26,28 and relatively good piezoelectric properties, with piezoelectric constant (d 33 ) in the range of 23-57 pC N À1 . [29][30][31][32][33][34][35][36][37][38][39] All this makes this material worth research, not only in the field of its application as bulk ceramics 4,6 or thin films 3,4 but also in form of 0-3 type composite materials. 5,7,40 Herein the results on the not described previously effect of polymer matrix stiffness on piezoelectric properties of 0-3 type epoxy matrix composites with BFO particles are presented.…”

“…One of the many noteworthy and well‐known multiferroic materials, exhibiting both ferroelectricity and antiferromagnetic properties above room temperature, 4,25,26 with high potential application in various fields of electronics is BiFeO 3 (BFO). It can be characterized by perovskite‐type rhombohedral R3c crystal structure, 27 high Curie temperature ( T c = 850°C), Nèel temperature ( T N = 370°C), 25,26,28 and relatively good piezoelectric properties, with piezoelectric constant (d 33 ) in the range of 23–57 pC N −1 29–39 . All this makes this material worth research, not only in the field of its application as bulk ceramics 4,6 or thin films 3,4 but also in form of 0‐3 type composite materials 5,7,40 .…”