Double Negative Property in Co/YIG Prepared by Low Temperature Impregnation Process

Abstract:

Impregnation method was used for fabricating Co/YIG (Y₃Fe₅O₁₂) composites under low temperature, and the electromagnetic properties were tuned by adjusting the content (0 wt% - 35 wt%) and microstructure of the metal in composites. The XRD and SEM were used to analyze the phase and microstructure. Electromagnetism properties including reactance, permittivity and permeability of the composites were tested using impedance analyzer (10 MHz~1 GHz). The results indicated that, the high cobalt content leads to the formation of three-dimensional cobalt networks on the pore walls of porous YIG gradually, and their electromagnetic properties have also been changed significantly with the Co content increasing. Especially, double negative properties were achieved in Co/YIG composites when the content of Co reached 35 wt% at the frequency band of 575 MHz-1 GHz. The appearance of double negative properties in cermets provides promising applications in electromagnetic stealth materials, microwave antenna, and traveling wave tubes.

• Periodical: Materials Science Forum (Volume 816)
• Pages: 107-112
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.816.107
• Online since: April 2015
• Authors: Xu Ai Wang, Run Hua Fan*, Zhi Cheng Shi, Min Chen, Ke Lan Yan, Kai Sun, Qing Hou, Zi Dong Zhang, Lei Qian
• Keywords: Cermets, Double Negative Materials, Electromagnetic Properties, Impregnation Method, Metal Networks

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