• PRADIP K MAJI

      Articles written in Bulletin of Materials Science

    • Investigation of multiferroic behaviour at room temperature in Bi-induced orthoferrite: combined experimental and first principles studies

      KUMARI NAVEEN NIKHIL KUMAR SONIA RANI TAPAS KUMAR MANDAL ANURAG GAUR P D BABU VASUDEVA SIRUGURI PRADIP K MAJI SUDIPTA KANUNGO AVIJIT KUMAR PAUL

      More Details Abstract Fulltext PDF

      Perovskite oxides are an important and exciting class of materials owing to the structural diversity with remarkable magnetic, optical and electronic behaviours. Here, a single-phase multiferroic orthoferrite, Y$_{0.74}$Bi$_{0.25}$FeO$_{2.97}$ (YBFO), has been synthesized by a conventional solid-state method. The crystal structure was refined using the Rietveld refinement method from powder X-ray diffraction data, and confirms an orthorhombic structure with the Pnma space group. The Curie-Weiss fitting to the magnetic susceptibility shows that the $\theta$-value is $–$926 K and $\mu_{\rm eff} = 5.59$ $\mu_{\rm B}$, exhibiting canted antiferromagnetism. Room temperature magnetic and ferroelectric hysteresis loops verify the presence of magnetic as well as ferroelectric ordering in the material with a remnant polarization ($P_{\rm r}$) of 0.27 $\mu$C cm$^{–2}$ and electric coercivity ($E_{\rm c}$) of 15 kV cm$^{–1}$. Temperature-dependent $P–E$ loops and pyrocurrent response confirm the inherent multiferroic nature of the material. The UV–visible study indicates a semiconductor nature with the bandgap of 1.86 eV. Density-functional theory calculations support the observed experimental behaviour and it signified the role of Bisubstitution. Even a very less concentration of Bi-doping can form an exciting room temperature multiferroic material.

  • Bulletin of Materials Science | News

    • Dr Shanti Swarup Bhatnagar for Science and Technology

      Posted on October 12, 2020

      Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
      Chemical Sciences 2020

      Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
      Physical Sciences 2020

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.