J. Mater. Sci. Technol. ›› 2007, Vol. 23 ›› Issue (04): 473-476.

• 论文 • 上一篇    下一篇

Structural and Magnetic Studies of CTAC-assisted NiZn Ferrite Films within 0.1–3.5 GHz

沈翔; 龚荣洲; 冯则坤; 何华辉   

  1. 华中科技大学电子科学与技术系
  • 收稿日期:2006-09-04 修回日期:2006-12-08 出版日期:2007-07-28 发布日期:2009-10-10
  • 通讯作者: 沈翔

Structural and Magnetic Studies of CTAC-assisted NiZn Ferrite Films within 0.1–3.5 GHz

Xiang SHEN, Rongzhou GONG, Zekun FENG, Huahui HE   

  1. Department of Electronic Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2006-09-04 Revised:2006-12-08 Online:2007-07-28 Published:2009-10-10
  • Contact: Rongzhou GONG

关键词: Spray, plating

Abstract: Spinel NiZn ferrite thin films were prepared on glass substrates by spray plating method. Adding cetyltrimethylammoniumchloride (CTAC), adsorptive energy of substrate surface increased, and smooth surface and uniform columnar film structures were observed. The optimum reaction temperature up to 85℃ and pH up to 7.5 were obtained. As the solution pH value increases from 6.5 to 7.5, the film saturation magnetization increases to 2.48×105 A/m and electric resistivity to 5.6×102 mΩ•cm. The high real part of complex permeability μ′ up to 36.1 and the imaginary part μ′′ up to 53.2 for NiZn ferrite film at 500 MHz were achieved, and higher magnetic resonance at 508 MHz was observed. As the ferrite plate thickness is 50 μm, the attenuating characteristics for reflection loss ≤-0.8 dB can be obtained in the wide frequency ranging from 0.5 to 2.7 GHz. The μ′′ of thin film has values higher than 20 at the frequencies between 0.5 and 2 GHz, and the thin film can be applied as shielding material in GHz range.

Key words: NiZn ferrite films, Spray plating, Complex permeability, Reflection loss, Saturation magnetization