Structural, Magnetic, and Ferroelectric Properties in Ion-Doped BiFeO₃ Ceramics

Abstract:

Rare-earth ion La is doped at the bismuth site in BiFeO₃ to produce Bi_0.8La_0.2FeO₃ polycrystalline ceramics via a sol-gel auto-combustion synthesis method. For comparison, the similar experiments are also carried out for the non-doped BiFeO₃ at the same time. It is found that both non-doped and La doped BiFeO₃ are composed of nanoscale crystallites (~50 nm). Furthermore, La doping suppresses the formation of the secondary phase and leads to a structural phase transition from a rhombohedral to an orthorhombic or a pseudotetragonal structure. More importantly, the magnetic and ferroelectric properties in La doped ceramics were both enhanced, as evidenced by the typical electric and magnetic hysteresis loops. These property evolutions can be attributed to the elimination of the secondary phase and the structural distortion caused by La doping.

• Periodical: Materials Science Forum (Volume 687)
• Pages: 391-395
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.687.391
• Online since: June 2011
• Authors: Shu Xia Zhang, Yan Wei Ma
• Keywords: Ferroelectric Property, Ferromagnetism, Multi-Ferroic Material

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