期刊
JOURNAL OF APPLIED PHYSICS
卷 118, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4927812
关键词
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资金
- Ministry of Education and Science of Russian Federation [UID RFMEFI59414X0011]
- RFBR [13-02-01391-a, 14-02-90447]
- UrFU
- Slovenian Research Agency [BI-RU/14-15-032, P2-0105, J2-5483]
- national funds through FCT/MEC [FCT UID/CTM/50011/2013]
- FEDER
BiFeO3 (BFO) is a classical multiferroic material with both ferroelectric and magnetic ordering at room temperature. Doping of this material with rare-earth oxides was found to be an efficient way to enhance the otherwise low piezoelectric response of unmodified BFO ceramics. In this work, we studied two types of bulk Sm-modified BFO ceramics with compositions close to the morphotropic phase boundary (MPB) prepared by different solid-state processing methods. In both samples, coexistence of polar R3c and antipolar P-bam phases was detected by conventional X-ray diffraction (XRD); the non-polar P-nma or P-bnm phase also has potential to be present due to the compositional proximity to the polar-to-non-polar phase boundary. Two approaches to separate the phases based on the piezoresponse force microscopy measurements have been proposed. The obtained fractions of the polar and non-polar/anti-polar phases were close to those determined by quantitative XRD analysis. The results thus reveal a useful method for quantitative determination of the phase composition in multi-phase ceramic systems, including the technologically most important MPB systems. (C) 2015 AIP Publishing LLC.
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