The Effect of High Magnetic Field on Electromagnetic Response and Microwave Absorption of Cobalt Particles During Annealing Process

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• 作者：Shulai Wen ; Chao Yao ; Dongliang Wang…
• 关键词：Microwave absorption ; Permeability ; Permittivity ; Cobalt particles
• 刊名：Journal of Superconductivity and Novel Magnetism
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：30
• 期：2
• 页码：463-468
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials;
• 出版者：Springer US
• ISSN：1557-1947
• 卷排序：30

文摘

The effect of high magnetic field on microwave absorption of cobalt particles, dispersed uniformly in a paraffin matrix, was investigated in microwave range of 2–18 GHz. The high magnetic field during annealing process could significantly improve the dielectric loss of cobalt particles. The maximum reflection loss of the cobalt particles annealed in high magnetic field is −25.00 dB while the coating thickness is 2.5 mm, which is raised by 62.87 % compared with the ones annealed without high magnetic field. The enhancement in microwave absorption may be ascribed to the improved dielectric loss of cobalt particles induced by high magnetic field.