skip to main content

SciTech ConnectSciTech Connect

Title: Room temperature multiferroic properties and magnetoelectric coupling in Sm and Ni substituted Bi{sub 4−x}Sm{sub x}Ti{sub 3−x}Ni{sub x}O{sub 12±δ} (x = 0, 0.02, 0.05, 0.07) ceramics

Lead free multiferroic Bi{sub 4−x}Sm{sub x}Ti{sub 3−x}Ni{sub x}O{sub 12±δ} (x = 0.02, 0.05, and 0.07) samples have been synthesized by conventional solid state route. X-ray diffraction analysis reveals single phase up to x = 0.07, and a secondary phase appears at x > 0.07. Raman spectroscopy confirms the local distortions in the crystal. Field emission scanning electron microscopy shows plate like grains. Substitution has increased the orthorhombic distortion, grain size, and hence the ferroelectric transition temperature (T{sub c}). A significant reduction in the values of dielectric constant (ε′) and loss tangent (tan δ) has been observed with the increase of Sm and Ni ions. The increase in dc resistivity at room temperature has been found with substitution. Enhancement in the values of remnant polarization (2P{sub r}) and magnetization (2M{sub r}) is observed. Magnetoelectric coupling coefficient (α) values of 0.60 mV/cm/Oe are achieved in Bi{sub 4−x}Sm{sub x}Ti{sub 3−x}Ni{sub x}O{sub 12±δ} ceramic samples. Hence, we have successfully converted the ferroelectric Bi{sub 4}Ti{sub 3}O{sub 12} into a multiferroic, which is a new lead free multiferroic material, can be useful for future electromagnetic devices.
Authors:
;  [1] ;  [2] ;  [3] ;  [1] ;  [4]
  1. Centre for Materials Science and Engineering, National Institute of Technology, Hamirpur, Himachal Pradesh 177 005 (India)
  2. Department of Physics, National Institute of Technology, Hamirpur, Himachal Pradesh 177 005 (India)
  3. National Physical Laboratory, New Delhi 110 012 (India)
  4. (India)
Publication Date:
OSTI Identifier:
22304327
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 20; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH COMPOUNDS; CERAMICS; CRYSTALS; FERROELECTRIC MATERIALS; FIELD EMISSION; GRAIN SIZE; MAGNETIC PROPERTIES; MAGNETIZATION; NICKEL COMPOUNDS; ORTHORHOMBIC LATTICES; OXYGEN COMPOUNDS; PERMITTIVITY; POLARIZATION; RAMAN SPECTROSCOPY; SAMARIUM COMPOUNDS; SCANNING ELECTRON MICROSCOPY; TANTALUM NITRIDES; TITANIUM COMPOUNDS; TRANSITION TEMPERATURE; X-RAY DIFFRACTION