Jump to main content
Jump to site search

Issue 36, 2017
Previous Article Next Article

Effect of erbium concentration on the structural, optical and electrical properties of a Bi4Ti3O12 system

Author affiliations

Abstract

We have studied the influence of erbium doping on the optical and electrical properties of a Bi4Ti3O12 compound. Bi4−xErxTi3O12 (x = 0.0, 0.1, 0.2 and 0.3) samples are prepared by the solid state reaction method. X-ray diffraction (XRD) revealed that our samples are homogenous and crystallize in the orthorhombic system with the Fmmm space group. Absorbance measurement reveals that the peak intensity increases with increasing erbium concentrations and this behavior confirms the good homogeneity of the samples. DC-conductivity measurements show that all samples are characterized by a semiconductor behavior. It is found that electrical conductivity is reduced considerably with increasing erbium content up to x = 0.3. This is due to the decrease in oxygen vacancy density. For the free compound, dc-conductivity is characterized by the appearance of a saturation region at a specific temperature (Tsat = 480 K). For Er doped compounds, Tsat goes beyond 600 K. An AC-conductivity study shows that the conductivity is governed by the jump relaxation model (JRM) and conduction through grain boundaries. We found that the conductivity spectrum of the investigated materials obeys the Jonscher universal double power law. The deduced activation energy increases when increasing the erbium content from Ea = 467 meV for x = 0 to Ea = 670 meV for x = 0.3. Increasing the Er substitution reduces the frequency dispersion of the real part of the dielectric constant ε′. Also, the tan δ plot indicates that the investigated samples exhibit the characteristics of a relaxor dielectric.

Graphical abstract: Effect of erbium concentration on the structural, optical and electrical properties of a Bi4Ti3O12 system

Back to tab navigation

Publication details

The article was received on 07 Dec 2016, accepted on 20 Apr 2017 and first published on 25 Apr 2017


Article type: Paper
DOI: 10.1039/C6RA27906F
Citation: RSC Adv., 2017,7, 22578-22586
  • Open access: Creative Commons BY license
  •   Request permissions

    Effect of erbium concentration on the structural, optical and electrical properties of a Bi4Ti3O12 system

    A. Bettaibi, R. Jemai, M. A. Wederni, R. M'nassri, M. Barbouche, H. Rahmouni and K. Khirouni, RSC Adv., 2017, 7, 22578
    DOI: 10.1039/C6RA27906F

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements