Phase Formation and Magnetic Properties of Bismuth Ferrite-Lead Titanate Multiferroic Composites

• Main Authors: Wongmaneerung R., Jantaratana P., Yimnirun R., Ananta S.
• Format: Article
• Language: English
• Published: 2014
• Online Access: http://www.scopus.com/inward/record.url?eid=2-s2.0-84878552105&partnerID=40&md5=b4b02557c407abd812563e1e3440736e; http://cmuir.cmu.ac.th/handle/6653943832/6751
• Institution: Chiang Mai University

In this study, phase formation and the magnetic properties of bismuth ferrite-lead titanate multiferroic composites were investigated. Multiferroic composites consisting of antiferromagnetic bismuth ferrite (BiFeO3 or BF) and ferroelectric lead titanate (PbTiO3 or PT) were synthesized by the solid-state sintering method. The presence of pure phase in these composites was confirmed by X-ray diffraction (XRD). The microstructure and magnetic properties were investigated by means of a scanning electron microscope (SEM) and vibrating sample magnetometer (VSM), respectively. Structural transformation from rhombohedral in pure BF to mixed-phase between rhombohedral and tetragonal when added with 50 wt% PT has been revealed from XRD analysis. The magnetic properties are generally seen to reduce with an increase in the content of the PT phase. Interestingly, the M-H hysteresis loop measurements indicated that the composites exhibited superparamagnetic behavior at room temperature for all compositions, a noticeable contradiction to the magnetic behavior earlier reported for the BF-PT solid-solution. © 2012 Springer Science+Business Media, LLC.