Investigation of Microwave Absorptive Behavior of La-Na Substituted M-Type Co-Zr Barium Hexaferrites in X-Band

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• 作者：Amit Arora ; Sukhleen Bindra Narang
• 关键词：Barium hexaferrite ; Dielectric properties ; Reflection loss ; Microwave absorber
• 刊名：Journal of Superconductivity Incorporating Novel Magnetism
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：29
• 期：11
• 页码：2881-2886
• 全文大小：1,615 KB
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Superconductivity, Superfluidity and Quantum Fluids
  Magnetism and Magnetic Materials
  Condensed Matter
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1557-1947
• 卷排序：29

文摘

La-Na-substituted Co-Zr barium hexaferrites were fabricated using the conventional ceramic sintering method. Characterization techniques like X-ray diffraction (XRD), scanning electron microscopy (SEM), vibration sample magnetometry (VSM) and vector network analysis (VNA) were used to analyze structural, magnetic and microwave absorption properties of prepared ferrites. The results show that the magnetoplumbite structures for all the samples have been formed. The magnetic properties such as saturation magnetization (M_s), remanence (M_r) and coercivity (H_c) were calculated from hysteresis loops obtained using a vibrating sample magnetometer (VSM). Also the present investigation demonstrates that microwave absorber using Ba_{(1 − 2x)}La_xNa_xFe₁₀CoZrO₁₉ ferrite can be fabricated for the applications in frequency band from 8.2 to 12.4 GHz, with a reflection loss less than −10 dB for specific frequencies, by controlling the molar ratio of the substituted ions.