A unique magnetic behavior and dielectric properties of Bi0.9-xLa0.1CaxFeO3 nanoparticles at room temperature

作者：Yang, Chou; Jiang, Ji-Sen^*; Wang, Chun-Mei; Zhang, Wei-Guo

来源：Journal of Physics and Chemistry of Solids, 2012, 73(1): 115-119.

DOI：10.1016/j.jpcs.2011.10.021

• Magnetic materials
• Sol-gel growth
• Differential scanning calorimetry (DSC)
• X-ray diffraction
• Magnetic properties

Ca2+ and La3+ ions co-doped BiFeO3 nanoparticles, Bi0.9-xLa0.1CaxFeO3 (BLCFOx) (x=0, 0.10, 0.13, 0.17 and 0.20), were prepared by a sol-gel method. X-ray diffraction analysis showed that the average grain size of the prepared samples was in the range of 24-19 nm. The lattice structure of the nanoparticles transformed from orthorhombic to cubic with Ca2+ ions substitution increased. Dielectric properties were measured up to high frequency similar to 80 MHz. It was found that the co-doping of suitable amount of La3+ and Ca2+ ions was helpful to improve the dielectric properties of the samples. Magnetic properties of the samples were improved and all the co-doped samples presented a wasp-waisted hysteresis loop, which was rarely reported in BFO. Characteristics of wasp-waisted hysteresis loops show low hysteresis loss in low magnetic fields, and are helpful to design some multiferroic devices.

• 出版日期2012-1
• 单位华东师范大学; 河口海岸学国家重点实验室