Scholarlink

<p>The present work explores how the temperature of calcination affects the physical comportments of Mg<sub>0.6</sub>Co<sub>0.4</sub>FeAlO<sub>4</sub> spinel ferrites prepared by the sol–gel method for two calcination temperatures. The results of X-ray data achieved by Rietveld refinement had remarkably verified the satisfactory crystallization of our materials in the cubic spinel structure with Fd3<sup>–</sup> m space group. Also, the optical measurements indicate that the samples have direct optical transitions, with estimated band gap energies (<i>E</i><sub><i>g</i></sub><i>)</i> from 1.56&#xa0;eV to (S850) and 1.36&#xa0;eV for (S950). Furthermore, the computed values of Urbach energies were determined to be (<i>E</i><sub><i>u</i></sub> = 1.85&#xa0;eV) for the sample calcined at S850 and (<i>E</i><sub><i>u</i></sub> = 1.02&#xa0;eV) for S950. On top of that, the reported Urbach energies are extremely low and drop as the annealing temperature grows, indicating that the compounds’ disorder and flaws have decreased. Optical conductivity, loss factors, refractive index and penetration depth changes versus wavelength were also thoroughly examined. In fact, several intriguing optoelectronic uses for the produced samples were inferred from the changes in these optical parameters.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Effect of Calcination Temperature on Structural and Optical Properties of Mg0.6Co0.4FeAlO4 Spinel Ferrites for Optoelectronic Applications and Non-volatile Organic Memories

  • 期刊论文

  • 发表日期：

    2025年7月12日

查看全文
  • Wiem Zarai,
  • Mokhtar Hjiri,
  • Fakher Hcini,
  • Salaheddine Mansouri,
  • Nazir Mustapha,
  • Francisco Gámiz,
  • Lassaad El Mir

摘要

The present work explores how the temperature of calcination affects the physical comportments of Mg0.6Co0.4FeAlO4 spinel ferrites prepared by the sol–gel method for two calcination temperatures. The results of X-ray data achieved by Rietveld refinement had remarkably verified the satisfactory crystallization of our materials in the cubic spinel structure with Fd3– m space group. Also, the optical measurements indicate that the samples have direct optical transitions, with estimated band gap energies (Eg) from 1.56 eV to (S850) and 1.36 eV for (S950). Furthermore, the computed values of Urbach energies were determined to be (Eu = 1.85 eV) for the sample calcined at S850 and (Eu = 1.02 eV) for S950. On top of that, the reported Urbach energies are extremely low and drop as the annealing temperature grows, indicating that the compounds’ disorder and flaws have decreased. Optical conductivity, loss factors, refractive index and penetration depth changes versus wavelength were also thoroughly examined. In fact, several intriguing optoelectronic uses for the produced samples were inferred from the changes in these optical parameters.