THz emission from Fe/Pt spintronic emitters with L10-FePt alloyed interface

iScience

Dimitrios Karfaridis¹  Isaak G. Vasileiadis¹  Thomas Kehagias¹  George Vourlias¹  George P. Dimitrakopoulos¹  Dominik Sokoluk²  Marco Rahm²  Laura Scheuer³  Burkard Hillebrands³  Moritz Ruhwedel³  René Beigang⁴  Evangelos Th. Papaioannou⁵  Garik Torosyan⁶ 

[1] Department of Physics, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece;Fachbereich Elektro-Informationstechnik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern 67663, Germany;Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, Kaiserslautern 67663, Germany;Fachbereich Physik, Technische Universität Kaiserslautern, Kaiserslautern 67663, Germany;Institut für Physik, Martin-Luther Universität Halle Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle, Germany;Photonic Center Kaiserslautern, Kaiserslautern 67663, Germany;

关键词: Physics;    Radiation physics;    Radiation transport;   

DOI  :  

来源: DOAJ

【 摘 要 】

Summary: 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.

【 授权许可】

Unknown