Bi-relaxation behaviors in epitaxial multiferroic double-Perovskite BiFe0.5Mn0.5O3/CaRuO3 heterostructures

• Main Authors: Chew, Khian Hooi, Jiang, Y., Miao, J., Zhang, X., Zhan, Q.
• Format: Article
• Language: English
• Published: AIP Publishing 2011
• Subjects: QC Physics
• Online Access: http://eprints.um.edu.my/8236/1/Miao-2011-Bi-relaxation_behavi.pdf; http://eprints.um.edu.my/8236/; http://apl.aip.org/resource/1/applab/v99/i6/p062905_s1
• Institution: Universiti Malaya

Multiferroic double-perovskite BiFe0.5Mn0.5O3 thin film heterostructures were epitaxially grown on CaRuO3-buffered (001) SrTiO3 by pulse laser deposition. Typical Vogel-Fulcher relaxorlike dielectric and magnetic susceptibilities were observed, implying the film exhibits the properties of an electric relaxor and a magnetic relaxor. Polarization and size of polar nanoregions (PNRs) were determined by fitting the dielectric constant to a multi-polarization mechanism model. It was found that PNRs of 7-11 nm decrease from 0.67 mu C/cm(2) to 0.11 mu C/cm(2), as the temperature increases from 380 K to 460 K. A weak ferromagnetism was observed via magnetic hysteresis loops up to 300 K. (C) 2011 American Institute of Physics. [doi:10.1063/1.3624847]