Composition-dependent ultrafast THz emission of spintronic CoFe/Pt thin films

We measure the transient THz emission of ultrathin spintronic bilayers composed of a cobalt–iron alloy (CoxFe1−x) and platinum (Pt), depending on the Co content 0 ≤ x ≤ 1. We find that the THz emission amplitude changes only slightly over the entire concentration range, indicating that Fe and Co con...

Full description

Saved in:

Bibliographic Details
Published in:	Applied physics letters Vol. 120; no. 4
Main Authors:	Schneider, Robert, Fix, Mario, Bensmann, Jannis, Michaelis de Vasconcellos, Steffen, Albrecht, Manfred, Bratschitsch, Rudolf
Format:	Journal Article
Language:	English
Published:	Melville American Institute of Physics 24-01-2022
Subjects:	Amplitudes Applied physics Bilayers Cobalt base alloys Emission Emitters Iron Multilayers Thin films
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	We measure the transient THz emission of ultrathin spintronic bilayers composed of a cobalt–iron alloy (CoxFe1−x) and platinum (Pt), depending on the Co content 0 ≤ x ≤ 1. We find that the THz emission amplitude changes only slightly over the entire concentration range, indicating that Fe and Co contribute similarly to the THz generation process. Additionally, we fabricate multilayer stacks and find that the THz amplitude is increased by up to 36% compared to a single bilayer CoFe/Pt spintronic emitter.
ISSN:	0003-6951 1077-3118
DOI:	10.1063/5.0076699