Design, fabrication and characteristic of two-layer microwave absorbers composed of magnetic micropowder-rubber composites in X-band frequency rangeYanfei He, Rongzhou Gong, Xiangcheng Li, Xian Wang and Qifa HuEPL, 77 6 (2007) 68006DOI: https://doi.org/10.1209/0295-5075/77/68006