Development of excellent hexaferrite microwave absorbers
in the Ka band (26.5–40 GHz)
Sang-Im Yoo, Sungjoon Choi, Jae-Hyoung You, Kang-Hyuk Lee(Department of Materials Science and Engineering and Research Institute of Advanced Materials Seoul National University Seoul 151-744 Korea), Seung-Young Park(Spin Engineering Physics Team Division of Scientific Instrumentation Korea Basic Science Institute Daejeon 34133 Korea)