Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 34, Issue 3, Pages 641-651Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2013.10.002
Keywords
Multiferroics; BiFeO3; Crystal structure; Dielectric properties; Ferromagnetism
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Funding
- Grant Agency of the Slovak Academy of Sciences [2/0053/11, COST MP0904 Action]
- Slovak Research and Development Agency [APVV-0222-103, APVV-COST-0042-06]
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The polycrystalline samples of multiferroic Bi1-xDyxFeO3 (x = 0, 0.1, and 0.2) were prepared by a modified solid state reaction method and characterized by X-ray diffraction, scanning electron microscopy, differential thermal analysis, dielectric and magnetic measurements. It was shown that the introduction of the Dy3+ ions stabilizes the perovskite structure and improves phase purity. The coexistence of the rhombohedral and orthorhombic phases was found to exist within the investigated concentration range 0.1 <= x <= 0.2. The changes and anomalies observed in dielectric response over a wide frequency range were correlated with the structural evolution and the development in microstructure. The SQUID measurements of the field-dependent magnetization at different temperatures demonstrated Dy doping to be a very effective method for inducing a weakly ferromagnetic state in the ferroelectric R3c phase of BiFeO3 in the absence of an external magnetic field. (C) 2013 Elsevier Ltd. All rights reserved.
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