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<p>In the present work, (1-x) BaTiO<sub>3-δ</sub> − xSrFeO<sub>3-δ</sub> (where x = 0 and 0.05) perovskite samples were prepared. The structure of these samples was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), high-resolution TEM (HR-TEM), EDS elemental mapping, X-ray photoelectron spectroscopy (XPS) and differential scanning calorimetry (DSC). The optical properties of BaTiO<sub>3-δ</sub> were enhanced with introducing SrFeO<sub>3-δ</sub> (x = 0.05) by the reduction of the direct and indirect band gap energies. The magnetic measurements of these samples confirmed the ferromagnetic ordering and it was enhanced with introducing SrFeO<sub>3-δ</sub> (x = 0.05). The dielectric constant (ε<sub>r</sub>) of BaTiO<sub>3-δ</sub> enhanced with introducing SrFeO<sub>3-δ</sub> (x = 0.05). The polarization-electric field (P-E) hysteresis loops and the bipolar strain-electric field (S-E) loops measurements showed that these samples have ferroelectric and piezoelectric nature, respectively. The sample at x = 0.05 showed good ability to generate ultrasonic waves with nominal frequency of proximately 5&#xa0;MHz.</p>

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The enhancement of the optical, magnetic, and ferroelectric properties of BaTiO3-δ by doping with SrFeO3-δ

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年4月1日

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  • E. K. Abdel-Khalek,
  • A. Abd El-Naser,
  • E. Nabhan,
  • M. S. Gaafar,
  • N. S. Abd El-Aal

摘要

In the present work, (1-x) BaTiO3-δ − xSrFeO3-δ (where x = 0 and 0.05) perovskite samples were prepared. The structure of these samples was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), selected area electron diffraction (SAED), high-resolution TEM (HR-TEM), EDS elemental mapping, X-ray photoelectron spectroscopy (XPS) and differential scanning calorimetry (DSC). The optical properties of BaTiO3-δ were enhanced with introducing SrFeO3-δ (x = 0.05) by the reduction of the direct and indirect band gap energies. The magnetic measurements of these samples confirmed the ferromagnetic ordering and it was enhanced with introducing SrFeO3-δ (x = 0.05). The dielectric constant (εr) of BaTiO3-δ enhanced with introducing SrFeO3-δ (x = 0.05). The polarization-electric field (P-E) hysteresis loops and the bipolar strain-electric field (S-E) loops measurements showed that these samples have ferroelectric and piezoelectric nature, respectively. The sample at x = 0.05 showed good ability to generate ultrasonic waves with nominal frequency of proximately 5 MHz.