Science China Technological Sciences

, Volume 56, Issue 1, pp 13–19 | Cite as

Magnetic and microwave absorption properties of Ni1−xZnxFe2O4 nanocrystalline synthesized by sol-gel method

Article

Abstract

Ni1−xZnxFe2O4 (0⩽x⩽1, in steps of 0.1) nanocrystallines were synthesized by sol-gel route. The doping effects of zinc on structural, magnetic and microwave absorption properties were investigated in detail. X-ray diffraction (XRD) results show that all the samples are single-phase spinel structure. The magnetic and microwave absorption properties are strongly dependent on the zinc content, which can be understood in terms of the cations redistribution in spinel tetrahedral and octahedral sites with the increase of zinc content. The magnetic measurement shows the antiferromagnetic nature of the samples for x=0.9 and x=1.0. The saturation magnetization reaches the maximum of 3.35 μB/f.u. at x=0.5. The optimal reflection loss (RL) of −29.6 dB is found at 6.5 GHz for an absorber thickness of 5 mm. The RL values exceeding −10 dB are obtained for the absorber in the range of 3.9–8.9 GHz. These Ni1−xZnxFe2O4 nanocrystallines may be attractive candidates for electromagnetic wave absorption materials.

Keywords

Ni-Zn ferrite magnetic measurement microwave absorption properties 

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Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  1. 1.Key Laboratory of Materials Physics, Institute of Solid State PhysicsChinese Academy of SciencesHefeiChina
  2. 2.School of Physics and Electronics InformationHuaibei Normal UniversityHuaibeiChina

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