期刊
THIN SOLID FILMS
卷 518, 期 24, 页码 E5-E8出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.tsf.2010.03.118
关键词
Bismuth ferrite; Chromium doping; Dielectric; Magnetic; Tunable morphology
类别
资金
- Australian Research Council [DP0987190]
- University of Wollongong
- Australian Research Council [DP0987190] Funding Source: Australian Research Council
Multiferroic BiFe1-xCrxO3 (x = 0.025, 0.05, 0.075, and 0.1) is prepared by the hydrothermal method. Samples are systematically characterized by X-ray diffraction, Rietveld refinement, SEM, dielectric and magnetic measurements. It is found that the lattice parameters, the morphology and the size of the obtained particles strongly depend on the Cr doping level. The lattice parameters a and c and the Fe-O (1) bond lengths decrease, while the Fe-O (2) bond lengths increase, as x values rise from 0.025 to 0.1. The particle morphology changes from spherical shape for pure BiFeO3 to octahedral shape for x = 0.1. The dielectric constant and the magnetization increase greatly with the increase of the Cr doping level. Both the M-T and the M-H results reveal that the Cr doping enhances the ferromagnetic state in the doped BiFeO3. The possible reasons for the enhanced magnetic and dielectric properties are discussed briefly. (C) 2010 Elsevier B.V. All rights reserved.
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