Dielectric Permittivity Changes with Magnetic Field in Iron-based Ferromagnetic Oxide Sputtered Films.
Dielectric Permittivity Changes with Magnetic Field in Iron-based Ferromagnetic Oxide Sputtered Films.
复制标题
铁基铁磁氧化物溅射薄膜中介电常数随磁场的变化。
DOI：
10.3379/jmsjmag.25.875
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发表时间：
2001
影响因子：
--
通讯作者：
T. Fujii
中科院分区：
文献类型：
--
作者：
A. Kajima;Y. Nakamura;M. Inoue;T. Fujii
研究了射频反应溅射制备的Fe_2O_3-BiO_3-PbTiO_3系薄膜的介电常数随磁场H的变化规律。Er‘，Er的实部随H变化，其最大相对变化量Er’，即|ΔEr‘/Er’|max在1~100 kHz的较宽频率范围内达到0.12%，虚部Er“不变。ΔEr‘-H曲线呈现磁滞回线，这一现象与微分磁导率Dm/dh密切相关。对铜取代的Fe_2O_3-B_2O_3-PbTiO_3薄膜也进行了同样的实验。少量的铜取代导致了磁软化，并降低了|ΔEr‘/Er’|max。
The variation of the dielectric permittivity er against magnetic field H in Fe2O3-Bi2O3-PbTiO3 system thin films prepared by rf-reactive sputtering was investigated. er', the real part of er changed with H. Its maximum relative change of er', i.e. |Δer'/er'|max reached values as large as 0.12% in a wide frequency range from 1 Hz to 100 kHz, whereas its imaginary part er" did not change. Δer' vs. H curve showed hysteresis loop, which was found to be a strongly correlated phenomenon with the differential magnetic permeability dM/dH. Same experiments were also carried out for Cu-substituted Fe2O3-Bi2O3-PbTiO3 films. A small amount of Cu-substitution resulted in magnetic softening, and the decrease of |Δer'/er'|max as well.