Ni-Zn-Co Ferrite Films Prepared at 90 C
Ni-Zn-Co Ferrite Films Prepared at 90 C
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90 C 下制备的 Ni-Zn-Co 铁氧体薄膜
DOI：
10.1109/intmag.2002.1000931
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Abe
中科院分区：
文献类型：
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作者：
N. Matsushita;Tatsuro Nakamura;M. Abe
采用旋转喷雾沉积法制备了Ni-Zn-Co铁氧体薄膜(Ni/sub0.16-0.21/zn/sub0.30-0.36/Co/subx/Fe/sub2.38-2.46/O/sub4/，x=0/spl sim/0.16)，薄膜的饱和磁化强度M/Sub S/大于440emu/cc。在Ni-Zn铁氧体薄膜中加入少量的Co替代x，薄膜平面内的磁各向异性由各向同性变为各向异性，磁易轴平行于旋转衬底上喷雾溶液的流动方向。在x=0.03时，矫顽力H/subc/和各向异性场H/subk/分别出现10和25Oe的小值。在20 MHz-3 GHz范围内测量了复磁导率，在x=0.03处获得了很高的静态磁导率/splµ/‘120和共振频率f/subr/900 MHz。这种Ni-Zn-Co铁氧体薄膜即使在3 GHz时也表现出很大的/splµ/“>；30，适用于吸波材料，以抑制高达微波频率的器件之间的电磁干扰。
Ni-Zn-Co ferrite films (Ni/sub 0.16-0.21/Zn/sub 0.30-0.36/Co/sub x/ Fe/sub 2.38-2.46/O/sub 4/, x=0/spl sim/0.16) were deposited by spin-spray ferrite plating method at low temperature of 90/spl deg/C. All the films had a saturation magnetization M/sub s/ larger than 440 emu/cc. A small amount of Co substitution x into Ni-Zn ferrite films changed the magnetic anisotropy in film plane from isotropic to anisotropic and the magnetic easy axis was parallel to the flowing direction of the sprayed solutions on the rotating substrate. The coercivity H/sub c/ and anisotropy field H/sub k/ took small values of 10 and 25 Oe at x=0.03. The complex permeability was measured in the range 20 MHz-3 GHz and very high static permeability /spl mu/' of 120 and resonance frequency f/sub r/ of 900 MHz were achieved at x=0.03. Exhibiting large /spl mu/">30 even at 3 GHz, this Ni-Zn-Co ferrite film is applicable for wave absorbers to suppress the electro-magnetic interference among devices up to microwave frequencies.