Phase transition and optical properties of samarium-doped BiFeO 3 nanoparticles
- PDF / 2,142,662 Bytes
- 11 Pages / 595.276 x 790.866 pts Page_size
- 104 Downloads / 229 Views
Phase transition and optical properties of samariumdoped BiFeO3 nanoparticles Mekonnen Tefera Kebede1, Venus Dillu2,*
, Sheela Devi3, and Sunil Chauhan2
1
Department of Nano-Science and Technology, School of Basic Sciences and Research, Sharda University, Greater Noida, UP 201310, India 2 Department of Physics, School of Basic Sciences and Research, Sharda University, Greater Noida, UP 201310, India 3 Department of Applied Sciences, Maharaja Surajmal Institute of Technology, C-4, Janakpuri, New Delhi 110058, India
Received: 28 May 2020
ABSTRACT
Accepted: 18 September 2020
Multiferroics are the materials having ferroelectric and magnetic properties simultaneously and can be tuned by controlling electric and magnetic field for the desired applications. Pure and samarium-doped bismuth ferrite nanoparticles Bi1-xSmxFeO3 (BSFO x = 0, 0.05, 0.10, 0.15, 0.20) with varied doping concentrations have been synthesized using sol–gel technique. The effect of doping on structural, morphological, elemental composition and optical properties were analyzed using various characterization techniques. X-ray diffraction (XRD) analysis of Bi1-xSmxFeO3 samples show the compressive lattice distortion and structural phase transformation from rhombohedral to orthorhombic phase. The Rietveld refinement shows that the crystalline structure of pristine BiFeO3 (BFO) is typical rhombohedral structure with R3c space group. Scanning electron micrograph (SEM) reveals that with increasing Sm concentration the grain size decreases up to * 30 nm. XRD and SEM analysis confirmed the synthesized samples having pure phase formation and nanocrystalline nature. Ultraviolet– Visible (UV–Vis) spectra of the samples show that the enhanced visible light absorption would be a promising material for photocatalytic application. The findings of X-ray photoelectron spectroscopy (XPS) verify the effective Sm doping in BFO samples.
Ó
Springer Science+Business
Media, LLC, part of Springer Nature 2020
1 Introduction Multiferroics are a crucial class of multifunctional materials in the same phase which have electrical and magnetic properties. These materials are extensively studied in the growing discipline of attenuating
Address correspondence to E-mail: [email protected]
https://doi.org/10.1007/s10854-020-04518-w
electromagnetic radiation, information storage media, resistive switches, gas sensors and multi-state memory devices, etc. [1–3]. Bismuth ferrite is one of the most promising material and attract extraordinary attention due to the combination of anti-ferromagnetic Neel temperature (TN * 643 K) and high
J Mater Sci: Mater Electron
ferroelectric Curie temperature (TC * 1143 K) [1, 4]. It is a G-type antiferromagnet with a symmetry permitted slight canting of the Fe3? moments and ferroelectric properties in BFO are induced by a rhombohedral distorted perovskite structure with space group R3c [5]. Even though R3c symmetry allow the presence of weak ferromagnetic moment and net magnetization for the cause of the Dzyaloshinskii-Moriya (DM) in
Data Loading...
