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首页> 外文期刊>IEEE Transactions on Magnetics >Effects of annealing on the microwave properties of spin-spray Ni-Zn ferrites
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Effects of annealing on the microwave properties of spin-spray Ni-Zn ferrites

机译：退火对自旋喷涂Ni-Zn铁氧体微波性能的影响

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摘要

We have studied the properties of a series of spinel ferrite thin films prepared from aqueous solutions at temperatures slightly below 100/spl deg/C, for a range of compositions from pure Fe/sub 3/O/sub 4/ to about Ni/sub 0.34/Zn/sub 0.18/Fe/sub 2.48/O/sub 4/. As made, the films are semiconducting and have high dielectric losses, but have narrow ferromagnetic resonance linewidths and often display standing spinwave spectra. As a result of annealing in air at temperatures above 300/spl deg/C, these ferrites undergo a transformation to a state having much higher resistivity and a reduced magnetic moment compared to as-grown films. This annealing decreases the microwave dielectric losses, but increases the ferromagnetic resonance linewidth. The changes in these properties with annealing are consistent with a partial transformation from spinel to maghemite, /spl gamma/-Fe/sub 2/O/sub 3/.
机译：我们已经研究了由水溶液在略低于100 / spl deg / C的温度下制备的一系列尖晶石铁氧体薄膜的性能，其成分范围从纯Fe / sub 3 / O / sub 4 /到约Ni / sub 0.34 / Zn / sub 0.18 / Fe / sub 2.48 / O / sub 4 /。制成的膜是半导体的，具有高介电损耗，但具有较窄的铁磁共振线宽，并经常显示自旋波谱。在高于300 / spl deg / C的温度下在空气中退火的结果是，与生长的薄膜相比，这些铁氧体转变为具有更高电阻率和更低磁矩的状态。该退火减少了微波介电损耗，但是增加了铁磁共振线宽。这些性质随退火的变化与从尖晶石到磁赤铁矿/ spl gamma / -Fe / sub 2 / O / sub 3 /的部分转变相一致。

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