Iron and Permalloy based magnetic monolithic tunable microwave devices
Iron and Permalloy based magnetic monolithic tunable microwave devices
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DOI：
10.1063/1.1557856
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发表时间：
2003-05
影响因子：
3.2
通讯作者：
B. Kuanr;L. Malkinski;R. Camley;Z. Celinski;P. Kabos
中科院分区：
文献类型：
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作者：
B. Kuanr;L. Malkinski;R. Camley;Z. Celinski;P. Kabos
我们制作了一系列磁性单片可调微波陷波滤波器和移相器。与以前的分子束外延生长金属铁磁体的工作不同，我们的器件是通过磁控溅射创建的。衬底材料为单晶GaAs(001)。铁和坡莫合金被用作共面波导几何形状的磁性材料。观察到滤光片的传输特性取决于衬底质量、薄膜沉积参数(Ar气压、生长速率、功率等)和颗粒尺寸。此外，我们还观察到铁基陷波滤光片的共振频率有了显著的提高。这种共振频率的增加是由于生长引起的单轴各向异性场为40kA/m所致。这是一个意想不到的重要结果，特别是因为观察到的各向异性是生长的，而不是场诱导的。共振频率由零场下的9.3 GHz移至外加静磁场时的15 GHz。
We fabricated a series of magnetic monolithic tunable microwave notch-filters and phase shifters. In contrast to previous work with molecular beam epitaxy grown metallic ferromagnets, our devices were created by magnetron sputtering. Single crystal GaAs (001) was used as a substrate. Iron and Permalloy were used as magnetic materials in a coplanar waveguide geometry. The transmission characteristics of the filters were observed to depend on substrate quality, film deposition parameters (Argon pressure, growth rate, power, etc.), and grain size. In addition we observed a substantial increase in the resonance frequency for the Fe based notch-filters. This increase in the resonance frequency is due to a growth-induced uniaxial anisotropy field of 40 kA/m in the Fe films. This is an unexpected and important result especially because the observed anisotropy is growth and not field induced. The resonance frequency shifted from 9.3 GHz at zero applied magnetic field to 15 GHz for an applied static magnetic field...