Scholarlink

<p>TiO<sub>2</sub> has been regarded as the most appropriate candidate for dilute magnetic semiconductors because of its practically observed and theoretically expected room temperature ferromagnetism. Therefore, a series of Fe doped Cu-TiO<sub>2</sub> dilute magnetic semiconductors has been synthesized with the general formula Fe<sub>x</sub>Cu<sub>0.15</sub>Ti<sub>0.85-x</sub>O<sub>2</sub> (x = 0, 5, 7, 9, 11 and 13 wt%) using sol-gel method. The prepared samples have been annealed at 550&#xa0;°C for two hours. The structural, Rietveld refinement, surface morphology, elemental, functional groups, optical, magnetic and dielectric properties have been investigated using X-ray diffractometer (XRD), X’Pert high score plus software, scanning electron microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDX), Fourier Transform Infrared Spectroscopy (FT-IR), UV-Visible spectroscopy (UV-Vis), Vibrating Sample Magnetometer (VSM) and LCR meter respectively. The XRD micrographs confirm the formation of single tetragonal anatase phase without any secondary peak. The surface morphology represents the spherical nanoparticles with definite boundaries. FTIR analysis shows the presence of Ti-O hydroxyl groups. The UV spectra exhibit the maxima at ultraviolet region ranges from 267 to 360&#xa0;nm and the band gap energy decreased with increasing dopant concentration. VSM analysis shows that the prepared nanoparticles show ferromagnetic behavior at room temperature. Saturation and remanence magnetization increase with increasing Fe concentration and coercivity decreases with increasing Fe contents. Dielectric measurements show that conductivity of the nanoparticles decreases with increasing frequency and dielectric constant increases with increasing frequencies. All the obtained results are desirable for various applications in spintronics industry.</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

Defect-induced magnetic ordering, modulating structural, optical and dielectric properties of Fe-substituted CuTiO₂ nanoparticles

  • 期刊论文

  • 发表日期：

    2026年5月20日

查看全文
  • Saniya Zafar,
  • Salma Waseem,
  • Fatima Ahtasham,
  • Talat Zeeshan,
  • Safia Anjum,
  • Zeeshan Mustafa

摘要

TiO2 has been regarded as the most appropriate candidate for dilute magnetic semiconductors because of its practically observed and theoretically expected room temperature ferromagnetism. Therefore, a series of Fe doped Cu-TiO2 dilute magnetic semiconductors has been synthesized with the general formula FexCu0.15Ti0.85-xO2 (x = 0, 5, 7, 9, 11 and 13 wt%) using sol-gel method. The prepared samples have been annealed at 550 °C for two hours. The structural, Rietveld refinement, surface morphology, elemental, functional groups, optical, magnetic and dielectric properties have been investigated using X-ray diffractometer (XRD), X’Pert high score plus software, scanning electron microscope (SEM), Energy Dispersive X-ray Spectroscopy (EDX), Fourier Transform Infrared Spectroscopy (FT-IR), UV-Visible spectroscopy (UV-Vis), Vibrating Sample Magnetometer (VSM) and LCR meter respectively. The XRD micrographs confirm the formation of single tetragonal anatase phase without any secondary peak. The surface morphology represents the spherical nanoparticles with definite boundaries. FTIR analysis shows the presence of Ti-O hydroxyl groups. The UV spectra exhibit the maxima at ultraviolet region ranges from 267 to 360 nm and the band gap energy decreased with increasing dopant concentration. VSM analysis shows that the prepared nanoparticles show ferromagnetic behavior at room temperature. Saturation and remanence magnetization increase with increasing Fe concentration and coercivity decreases with increasing Fe contents. Dielectric measurements show that conductivity of the nanoparticles decreases with increasing frequency and dielectric constant increases with increasing frequencies. All the obtained results are desirable for various applications in spintronics industry.