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- Title
Enhancement of dielectric and magnetic properties in phase pure, dense BiFeO<sub>3</sub> nanoceramics synthesized by spark plasma sintering techniques.
- Authors
Tian, Yahui; Fu, Qiuyun; Xue, Fei; Zhou, Ling; Wang, Chaohong; Gou, Haibo; Hu, Yunxiang; Zheng, Zhiping; Luo, Wei; Zhang, Mingzhi
- Abstract
Phase pure, dense BiFeO3 (BFO) ceramics with average grain sizes of ~ 110 nm, ~ 450 nm, and ~ 1.15 µm were fabricated by spark plasma sintering method. BFO ceramics exhibited grain-size-dependent magnetic properties, which ascribed to the antiferromagnetism-ferromagnetism (AFM-FM) transition. For BFO nanoceramics (~ 110 nm), such transition was much significant, and contributed to a large exchange bias field of HEB = 500 Oe at 5 K. In addition, BFO nanoceramics (~ 110 nm) exhibited lower leakage current and higher resistivity compared to the larger-grained BFO ceramics (~ 450 nm and ~ 1.15 µm). The calculated activation energies (Ea) and X-ray photoelectron spectroscopy analyses revealed the existence of different types of defects in BFO ceramics with different grain sizes.
- Subjects
MAGNETIC properties; SINTERING; FERROELECTRICITY; MAGNETISM; COMPUTATIONAL magnetism; CERAMICS
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 20, p17170
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-9808-3