In this work, we investigated a series of polycrystalline FeGa/FeCo bilayers with different FeGa thicknesses fabricated by radio-frequency magnetron sputtering. The bilayers exhibit an in-plane anisotropy since an external magnetic field is applied in the plane of bilayers when FeGa layer is deposited. The grain size and the total saturation magnetization (4πM_S) of FeGa/FeCo bilayers change with the increase of the thickness of the FeGa layer. In addition, the in plane and out-of-plane angle variation of resonance spectra are obtained by electron spin resonance measurement, indicating that the magnetic resonance field and the saturation magnetization of the FeGa and FeCo layer can be affected by the thickness of the FeGa layer respectively.

在这项工作中，我们研究了一系列通过射频磁控溅射制造的具有不同 FeGa 厚度的多晶 FeGa/FeCo 双层。双层表现出面内各向异性，因为在沉积 FeGa 层时在双层平面中施加了外部磁场。FeGa/FeCo 双层的晶粒尺寸和总饱和磁化强度 (4π M _S ) 随 FeGa 层厚度的增加而变化。此外，通过电子自旋共振测量获得了共振光谱的面内和面外角度变化，表明FeGa和FeCo层的磁共振场和饱和磁化强度会受到FeGa厚度的影响层分别。