论文标题
外延fe $ _3 $ si/gaas混合结构
Resonant and off-resonant magnetoacoustic waves in epitaxial Fe$_3$Si/GaAs hybrid structures
论文作者
论文摘要
表面声波（SAW）在微/纳米 - 金属设备中的应变和磁化之间提供了有效的动力学耦合。使用由压电电气，GAAS和铁磁远母型合金薄膜（Fe $ _3 $ si）组成的混合装置，我们能够量化通过X射线光电机显微镜中的磁成像通过磁成像通过磁性成像产生的磁性波的幅度。样品的立方各向异性以及低阻尼系数可以观察到谐振和非谐振磁弹性耦合。此外，通过微磁模拟，我们验证了实验行为并量化了Fe $ _3 $ SI中的磁弹性剪切应变成分，似乎很大（$ b_2 = 14 \ times 10^6 $ j/m $^3 $），比在镍中发现的大得多。
Surface acoustic waves (SAWs) provide an efficient dynamical coupling between strain and magnetization in micro/nano-metric devices. Using a hybrid device composed of a piezoelectric, GaAs, and a ferromagnetic Heusler alloy thin film, Fe$_3$Si, we are able to quantify the amplitude of magnetoacoustic waves generated with SAWs via magnetic imaging in an X-ray photoelectron microscope. The cubic anisotropy of the sample together with a low damping coefficient allows for the observation of resonant and non-resonant magnetoelastic coupling. Additionally, via micromagnetic simulation, we verify the experimental behavior and quantify the magnetoelastic shear strain component in Fe$_3$Si that appears to be very large ($b_2=14\times 10^6$ J/m$^3$), much larger than the one found in Nickel.
