|
Institut f. Physik FG Nanostrukturierte Materialien
Martin-Luther-Universitat Halle-Wittenberg
Von-Danckelmann-Platz 3, D-06120 Halle, Germany
Tel.: +49 345 55 25321
Fax.: +49 345 55 27034
|
|
Laura Scheuer, Moritz Ruhwedel, Dimitrios Karfaridis, Isaak G.Vasileiadis, Dominik Sokoluk, GarikTorosyan, George Vourlias, George P.Dimitrakopoulos, Marco Rahm, Burkard Hillebrands, Thomas Kehagias, René Beigang, Evangelos Th.Papaioannou THz emission from Fe/Pt spintronic emitters with L10-FePt alloyed interface iScience Volume 25, Issue 5 (2022-05-16 13:39:20), 104319 DOI: 10.1016/j.isci.2022.104319
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 L10-FePt alloy interlayer. Subsequently, we establish that a Fe/L10-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. |
|