To tune high-frequency properties, NiFe films are fabricated on triangular wave-like surface of Al₂O₃ substrate by magnetron sputtering. Faceting, the transformation of a planar surface into two or more surfaces, can be observed on m-plane Al₂O₃ substrate via annealing process and further format the continuous periodic triangular wave-like structure. The wavelength and oscillation can be adjusted by annealing temperature and time. The magnetic anisotropy field (H_k) of the magnetic film is increased to 320 Oe and the resonance frequency (f_r) also has a big improvement to 5.4 GHz. These changes are mainly attributed to the dipolar interaction between surface magnetic charges in the studied system. We prove that high-frequency properties of the soft magnetic film can be controlled by designing a nanoscale periodic triangular wave-like morphology on film surface.

为了调节高频特性，通过磁控溅射在Al ₂ O ₃衬底的三角波状表面上制备NiFe膜。可以通过退火工艺在m平面Al ₂ O ₃衬底上观察到刻面，即将一个平面转换为两个或多个表面，并进一步格式化了连续的周期性三角波状结构。波长和振荡可通过退火温度和时间来调节。磁性膜的磁各向异性场（H _k）增加到320 Oe，共振频率（f _r）在5.4 GHz方面也有很大改进。这些变化主要归因于研究系统中表面电荷之间的偶极相互作用。我们证明，通过在膜表面设计纳米级周期性三角波状形态，可以控制软磁膜的高频特性。