Ni3Zn ferrite octahedral nanoparticles with high microwave permeability and high magnetic loss tangent
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- 作者：Zhongzhu Wang ; Mingzai Wu ; Shaowei Jin ; Guang Li ; Yongqing Ma ; Peihong Wang
- 关键词：Ni3Zn ferrite ; Octahedron ; Microwave permeability ; Complex permittivity
- 刊名：Journal of Magnetism and Magnetic Materials
- 出版年：2013
- 出版时间：October, 2013
- 年：2013
- 卷：344
- 期：Complete
- 页码：101-104
- 全文大小：1188 K
文摘
Ni3Zn ferrite octahedral nanoparticles with grain size of about 40 nm were synthesized via a low temperature hydrothermal route. The saturation magnetization (Ms) and coercive force (Hc) of the sample are 57.5 emu/g and 197 Oe, respectively. In 50 MHz-8 GHz frequency range, the complex permeability and complex permittivity for Ni3Zn ferrite/wax composites containing 60 wt % ferrite powders were measured by a vector network analyzer. The real part of the permeability exhibits high values between 4 and 1.65 in 50 MHz-2 GHz range, and the imaginary part of the permeability presents a broad peak with a maximum value of 1.53 at 2.1 GHz, the calculated reflection loss of ferrite/wax coating with the thickness of 8 mm reaches ?13 dB at 2.1 GHz. The results indicate the as-prepared Ni3Zn ferrite octahedral nanoparticles can have applications in biomedicine, and microwave absorption and electric devices.