Tailoring the dielectric and magnetic properties of Eu-substituted BiFeO3 nanoparticles

Publication date: Available online 21 January 2020Source: Materials Today: ProceedingsAuthor(s): Jincemon Cyriac, Jilu C. John, Nandakumar Kalarikkal, Saji AugustineAbstractA systematic investigation into the enhanced dielectric and magnetic properties of europium - doped bismuth ferrite (Bi(1-x)EuxFeO3, x = 0.0–0.3) multiferroic nanoparticles highlights its usefulness for device miniaturization and high-density data storage systems in nanoelectronics. The samples were synthesized by sol–gel method and calcined at 873 K. Structural characterization by X-ray diffraction and transmission electron microscopy showed the distribution of nanocrystallites with narrow size distribution and further revealed a transformation of the crystalline structure from the initial rhombohedra (R3c) to an orthorhombic (Pn21a) one. This was also accompanied by significant lattice contraction and the elemental composition for each Eu-incorporation was examined through energy dispersive analysis of X- Rays (EDAX). The EDAX studies clearly confirmed the successful and accurate incorporation of Eu3+ in place of Bi3+ and the presence of oxygen vacancies in the samples. Sample with × = 0.2 showed the maximum value of dielectric constant ε′ and leakageε′′ as well as a.c. conductivity(σ). Magnetic response studies reflected the enhancement of spontaneous magnetization by Eu-doping. The maximum values of saturation magnetization MS, remnant magnetization (Mr), and coercivity (HC) wer...
Source: Materials Today: Proceedings - Category: Materials Science Source Type: research