Magnetic properties of NiFe_{2鈭?span style='font-style: italic'>x}RE_xO₄ (RE=Dy, Gd) using magnetic Compton scattering

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• 作者：Jagrati Sahariya^a ; H.S. Mund^a ; Arvind Sharma^a ; Alpa Dashora^b ; M. Itou^c ; Y. Sakurai^c ; B.L. Ahuja^a ; ^{blahuja@yahoo.com" class="auth_mail}
• 关键词：Magnetic Compton scattering ; Local spin moment ; Ferromagnetic materials
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：June, 2014
• 年：2014
• 卷：360
• 期：Complete
• 页码：113-117
• 全文大小：430 K

文摘

Temperature dependent spin momentum densities of NiFe_2鈭?em>xRE_xO₄ (x=0, 0.05; RE=Dy, Gd) ferrites have been measured using a magnetic Compton spectrometer available at SPring-8, Japan. The experimental profiles of NiFe₂O₄ (NFO) with doping of Dy and Gd show almost similar spin moment as of undoped NFO. The contribution of different constituents in the formation of total spin moment is also deduced from the analysis of Compton line shape. It is seen that 5% doping of Dy³⁺ or Gd³⁺ ions at Fe³⁺ sites leads to a redistribution of spin moment at Fe³⁺ and RE³⁺ sites. The magnetic Compton data when compared with the magnetization data (using a vibrating sample magnetometer) show almost a constant orbital moment (0.21卤0.03 碌_B/f.u.) in the doped and undoped NFO.