论文标题
用l1 $ _ {0} $从Fe/pt Spintronic发射器发出的Thz发射
THz emission from Fe/Pt spintronic emitters with L1$_{0}$-FePt alloyed interface
论文作者
论文摘要
纳米磁性和旋转型的最新发展使超快旋转物理学用于Terahertz（THZ）发射。由铁磁FM /非磁性（NM）薄膜异质结构组成的Spintronic Thz发射器具有令人印象深刻的特性，可用于THZ光谱法，并且在科学和工业应用中具有巨大的潜力。在这项工作中，我们通过研究工程界面的Fe/pt双层，重点关注FM/NM界面对THZ排放的影响。特别是，我们通过插入有序的L1 $ _ {0} $ - FEPT合金中间层来故意修改Fe/Pt接口。随后，我们确定Fe/L1 $ _ {0} $ - FEPT（2 \，nm）/PT配置在THZ发射振幅方面优于Fe/Pt BiLayer结构。后者取决于界面两侧合金的范围。独特的三层结构从下一代Spintronic Thz发射器的物质选择方面开辟了新的观点。
Recent developments in nanomagnetism and spintronics have enabled the use of ultrafast spin physics for terahertz (THz) emission. Spintronic THz emitters, consisting of ferromagnetic FM / non-magnetic (NM) thin film heterostructures, have demonstrated impressive properties for the use in THz spectroscopy and have great potential in scientific and industrial applications. In this work, we focus on the impact of the FM/NM interface on the THz emission by investigating Fe/Pt bilayers with engineered interfaces. In particular, we intentionally modify the Fe/Pt interface by inserting an ordered L1$_{0}$-FePt alloy interlayer. Subsequently, we establish that a Fe/L1$_{0}$-FePt (2\,nm)/Pt configuration is significantly superior to a Fe/Pt bilayer structure, regarding THz emission amplitude. The latter depends on the extent of alloying on either side of the interface. The unique trilayer structure opens new perspectives in terms of material choices for the next generation of spintronic THz emitters.
