鎳鐵合金二維磁振子晶格之鐵磁共振譜研究

Abstract

在這篇研究中，我們回顧了不同形狀、直徑、厚度的Py圓點陣列對鐵磁共振(ferromagnetic resonance, FMR)造成的影響。並且為了提高磁性薄膜的磁性能，對不同的墊材進行研究。在這項實驗中，我們使用了電子束微影技術分別製作薄膜和直徑為5 μm，邊對邊間距為5 μm，厚度為30 nm的鎳鐵合金圓點陣列。並且透過電子束蒸鍍儀系統在室溫條件下成長樣品。我們選擇了共平面波導(Coplanar waveguide, CPW)的樣品結構，利用向量網路分析儀(vector network analyzer, VNA)輸入微波信號，在外加磁場的作用下，測量了鐵磁共振(ferromagnetic resonance, FMR)現象。

In this study, we examined the influence of Py (Permalloy) dot arrays with different shapes, diameters, and thicknesses on ferromagnetic resonance (FMR). Additionally, we investigated different underlayers in order to enhance the magnetic properties of thin films.In this experiment, electron beam lithography was used to fabricate thin films and permalloy dot arrays with a diameter of 5 μm, a spacing of 5 μm, and a thickness of 30 nm. These arrays were grown using an electron beam evaporation system at room temperature. We selected a sample structure based on a coplanar waveguide (CPW) and employed a vector network analyzer (VNA) to introduce microwave signals. Under the influence of an externally applied magnetic field, we measured the phenomenon of ferromagnetic resonance (FMR).