首页    期刊浏览 2024年12月02日 星期一
登录注册

文章基本信息

  • 标题:Observation on magnetic variation for low concentration of bismuth and samarium doped Ni–Co ferrites
  • 本地全文:下载
  • 作者:Ch. Arun Kumar ; Ch. Arun Kumar ; G. Ganapathi Rao
  • 期刊名称:Karbala International Journal of Modern Science
  • 印刷版ISSN:2405-609X
  • 电子版ISSN:2405-609X
  • 出版年度:2018
  • 卷号:4
  • 期号:1
  • 页码:143-150
  • DOI:10.1016/j.kijoms.2018.01.001
  • 语种:English
  • 出版社:Elsevier
  • 摘要:AbstractSamarium and bismuth are doped in lower concentration in Ni0.7Co0.3Fe2−xRxO4(x = 0, 0.02, 0.04, 0.06) (R = Sm or Bi) and are prepared using ceramic route and sintered at 1150 °C for 4 h. X-ray diffraction confirms the cubic structure without any distortion for higher ionic radii ions in the spinel structure. High strain is observed for Ni0.7Co0.3Fe1.98Bi0.02O4among investigated samples. Field-emission scanning electron microscope (FE-SEM) confirms the doping of bismuth and samarium in expected ratio for Rx–Ni–Co ferrites. Low concentration doping effects were characterized using spectroscopic techniques, by which four primary bands were noted from Fourier transform infrared (FTIR) and Raman spectroscopy. Saturation magnetization decreases for lower concentrated ions, substituted in Ni–Co ferrites, saturation magnetization shows increase in higher concentration, attributing to changes that occur due to exchange interactions. Coercivity increases with the increase in samarium but decreases with bismuth substitution.
  • 关键词:Ferrites;Magnetic properties;Spectroscopic techniques;Rare earth
国家哲学社会科学文献中心版权所有