Enhanced Magnetic and Dielectric properties of Eu and Co co-doped BiFeO3 nanoparticles

Kaushik Chakrabarti, K. Das, B. Sarkar, Sirshendu Ghosh, S.K. De, G. Sinha, J. Lahtinen

Research output: Contribution to journalArticleScientificpeer-review

170 Citations (Scopus)

Abstract

Bi 1-xEu xFe 1-yCo yO 3 (x 0, 0.01; y 0, 0.01) nanoparticles, having an average size of 13 nm, were prepared by a simple sol gel route. Strong electronegativity of Eu 3 and smaller oxidation-reduction potential of Co 3/Co 2 (0.55 eV) than Fe 3/Fe 2 (1.3 eV) increase the concentration of Fe 3 ions with doping. Distinct magnetic hysteresis and complete saturation of magnetisation indicate the presence of ferromagnetic phase. The successful co-doping of Eu and Co into BiFeO 3 (BFO) lattice dramatically enhances the saturation magnetization (M s) and coercivity (H c) by about 20 times than that of pure BiFeO 3. A large value of dielectric constant of about 650, low loss (0.001), and small leakage current density (1.79 × 10 -8 A/cm 2) are observed for the co-doped sample. © 2012 American Institute of Physics.
Original languageEnglish
Article number032401
JournalApplied Physics Letters
Volume101
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • nanoparticles

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