Tweaking the red emission, magneto, and dielectrical properties of perovskite type-LaFeO3 in the presence of Co substitution

Ramesh Kumar Raji, Vishista Kurapati, Tholkappiyan Ramachandran, M. Muralidharan, R. Suriakarthick, M. Dhilip, Fathalla Hamed

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

Perovskite-structured LaCoxFe1−xO3 (x = 0.05, 0.1, 0.15, 0.2, 0.25) ceramic powders were produced via traditional solid-state reaction method. X-ray diffraction pattern, infrared spectra, and Raman have proved the formation of lanthanum perovskite. The incorporation of Co atoms in host lattice and the distortion of atoms were analyzed using Rietveld refinement method. The microstructure, nominal chemical composition, and uniform distribution of the particles and elements within the LaCoxFe1−xO3 powders were examined by SEM–EDS and elemental mapping. The energy gap (Eg) value sof ceramic powders was estimated using UV–Vis spectroscopy, where the Eg values are in the range of 3.75 eV and 3.92 eV. The interesting red emission at 592 nm was identified by PL spectra. The dielectric behavior such as dielectric constant (ε′) and loss (tan δ) decreases with respect to increase in frequency of 10 Hz–1 MHz; on controversy, it increases with increasing temperature (40–200 °C). Magnetic studies clearly show the ferromagnetic (FM) nature of all the samples at room temperature. At higher substituting of Co content (x = 0.25), which has Co–Co interactions can be coupled antiferromagnetically, prominent to the small reduction of Mr and Ms. Hence, the obtained results related to the physical properties of synthesized ceramic powders were investigated.

Original languageEnglish
Pages (from-to)7998-8014
Number of pages17
JournalJournal of Materials Science: Materials in Electronics
Volume31
Issue number10
DOIs
Publication statusPublished - May 1 2020

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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