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- Title
Enhanced Ferromagnetic, Ferroelectric, and Dielectric Properties in BiFeO-SrTiO-BiNaTiO Ceramics.
- Authors
Qian, Guoyu; Zhu, Changming; Wang, Liguang; Tian, Zhaoming; Yin, Chongyang; Li, Canglong; Yuan, Songliu
- Abstract
Room-temperature multiferroic (1 − x)BiFeO- x(SrTiO-BiNaTiO) (BFO-ST-BNT) ( x = 0 to 0.5) solid solutions have been prepared by the modified Pechini method, and their structural, ferromagnetic, ferroelectric, and dielectric properties systematically studied. In addition, a gradual phase transformation from rhombohedral to pseudocubic structure was observed between the compositions with x = 0.2 and x = 0.3. Compared with pure BiFeO, significantly enhanced remanent magnetization ( M = 0.11 emu/g) was determined in the sample with x = 0.2 at room temperature. Although the ferroelectric properties exhibited overall enhancement with increasing x, relatively large remanent polarization P (1.14 μC/cm at 300 K) was achieved simultaneously at the optimal composition with x = 0.2. Moreover, we measured an outstanding relative dielectric constant of over 16,700 at frequency of 10 kHz for the sample with x = 0.2, which is attributed to polarization of defect dipoles. This comprehensive enhancement of the ferromagnetic, ferroelectric, and dielectric properties indicates that BFO-ST-BNT ceramics are promising candidates for use in multiferroic applications.
- Subjects
MULTIFERROIC materials; FERROELECTRIC materials; FERROMAGNETIC materials; MAGNETIC dipoles; MAGNETIC pole; DIPOLE moments
- Publication
Journal of Electronic Materials, 2017, Vol 46, Issue 11, p6717
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-017-5689-0