title: Bandwidth enhancement in microwave absorption of binary nanocomposite ferrites hollow microfibers.
abstract: The binary Ba0.5Sr0.5Fe12O19 (BSFO)/Ni0.5Zn0.5Fe2O4 (NZFO) nanocomposite ferrites hollow microfibers with high aspect ratios have been prepared by the gel precursor transformation process. These microfibers possess a high specific surface area about 45.2 m2 g(-1), and a ratio of the hollow diameter to the fiber diameter estimated about 5/7. The binary nanocomposite ferrites are formed after the precursor calcined at 750 degrees C for 3 h. Their minimum reflection loss (RL) is -38.1 dB at 10.4 GHz. The microwave absorption bandwidth with RL value exceeding -20 dB covers the whole X-band (8.2-12.4 GHz) and Ku-band (12.4-18 GHz). This enhancement in microwave absorption can be attributed to the exchange-coupling interaction, interfacial polarization and small size effect in nanocomposite hollow microfibers.
authors.affiliation: Institute for Advanced Materials, Jiangsu University, Zhenjiang 212013, China.
authors.forename: Fuzhan
authors.initials: F
authors.lastname: Song
authors.forename: Xiangqian
authors.initials: X
authors.lastname: Shen
authors.forename: Xinchun
authors.initials: X
authors.lastname: Yang
authors.forename: Xianfeng
authors.initials: X
authors.lastname: Meng
authors.forename: Jun
authors.initials: J
authors.lastname: Xiang
authors.forename: Ruijiang
authors.initials: R
authors.lastname: Liu
authors.forename: Mingdong
authors.initials: M
authors.lastname: Dong