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<p>This study elucidate, Gd doped Er<sub>1–<i>x</i></sub>Gd<sub><i>x</i></sub>FeO<sub>3</sub> (<i>x</i> = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) structural and dielectric properties of ErFeO<sub>3</sub> samples prepared using sol–gel process. X-ray diffraction and energy-dispersive x-ray spectroscopy studies validate the Gd substitution at Er site without any impurity. The oxidation states of Er, Gd, Fe, and O were made to know through x-ray photoelectron spectroscopy (XPS). P–E loop measurements revealed unsaturated loops with noticeable losses. The frequency-dependent dielectric constant demonstrates a decrease in dielectric constant with increasing frequency and dipolar polarization dominating at lower frequencies. The results construe the influence of bond length and bond angles on the dielectric properties, suggesting that shorter Fe-O bond lengths and larger bond angles of Fe-O-Fe enhances the polarization as well as dielectric permittivity. This study provides valuable insights to design ErFeO<sub>3</sub> multiferroic materials for dielectric based behaviour applications.</p> Graphical abstract <p><UnorderedList Mark="Bullet"> <ItemContent> <p>This study aims to understand the structural, electrical polarization and frequency-dependent dielectric properties of ErFeO<sub>3</sub> multiferroics doped with Gd at Er site with reference to bond angles and bond lengths.</p> </ItemContent> <ItemContent> <p>Ferroelectric nature was studied through P–E loops at room temperature, exhibited unsaturated behavior and it is consistent with the centro-symmetric <Emphasis Type="BoldItalic">Pbnm</Emphasis> space group, with enhanced polarization and coercive fields observed at higher applied voltage.</p> </ItemContent> </UnorderedList></p>

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Investigation on structural and dielectric properties of ErFeO3 orthoferrite: Gd doped at Er site

  • 期刊论文

  • 发表日期：

    2026年2月17日

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  • Vankudothu Nagendar,
  • Anusha Purnakanti,
  • Sreedhar Yellipeddy,
  • Nageswar Rao Puli,
  • M. Sreenath Reddy

摘要

This study elucidate, Gd doped Er1–xGdxFeO3 (x = 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) structural and dielectric properties of ErFeO3 samples prepared using sol–gel process. X-ray diffraction and energy-dispersive x-ray spectroscopy studies validate the Gd substitution at Er site without any impurity. The oxidation states of Er, Gd, Fe, and O were made to know through x-ray photoelectron spectroscopy (XPS). P–E loop measurements revealed unsaturated loops with noticeable losses. The frequency-dependent dielectric constant demonstrates a decrease in dielectric constant with increasing frequency and dipolar polarization dominating at lower frequencies. The results construe the influence of bond length and bond angles on the dielectric properties, suggesting that shorter Fe-O bond lengths and larger bond angles of Fe-O-Fe enhances the polarization as well as dielectric permittivity. This study provides valuable insights to design ErFeO3 multiferroic materials for dielectric based behaviour applications.

Graphical abstract

This study aims to understand the structural, electrical polarization and frequency-dependent dielectric properties of ErFeO3 multiferroics doped with Gd at Er site with reference to bond angles and bond lengths.

Ferroelectric nature was studied through P–E loops at room temperature, exhibited unsaturated behavior and it is consistent with the centro-symmetric Pbnm space group, with enhanced polarization and coercive fields observed at higher applied voltage.