Related Experiment Video
Updated: May 24, 2025

Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Magnetization dynamics and proximity effects in ultrasoft composition modulated amorphous CoAlZr alloy thin films
Asgeir Tryggvason1, Andrew Caruana2, Christy Kinane2
1Science Institute, University of Iceland, Dunhaga 3, 107, Reykjavik, Iceland. ast15@hi.is.
Abstract:
The magnetic properties of amorphous thin films are shaped by inherent composition variations and magnetic proximity effects. Their magnetic properties can be tuned precisely with composition over a continuous range and their high resistance reduces shunting in spintronic systems. We examine the static and dynamic magnetic properties of amorphous magnetic thin films of Cox(Al0.7Zr0.3)1-x in the range , with and without a purposely modulated composition. The Gilbert damping is very low but increases dramatically with decreasing Co content. Damping is also studied in a CoAlZr multilayer with alternating intrinsically paramagnetic and ferromagnetic layers, and a film with a continuously modulated composition, both showing low damping. The structural and magnetic depth profiles of the heterostructures are measured with XRR and PNR, where proximity-induced magnetization is observed in the paramagnetic constituents. The enhancement in magnetization and reduction in damping is equivalent to an increase in mean Co content of approximately 3.4 at% and 1.9 at% for the multilayer and continuously modulated film, respectively. The results demonstrate how composition modulations affect the static and dynamic properties of thin films and how the magnetic proximity effect reduces the impact of such variations in composition.
More Related Videos
08:25Chemical Vapor Deposition of an Organic Magnet, Vanadium Tetracyanoethylene
Published on: July 3, 2015
06:49Radio Frequency Magnetron Sputtering of GdBa2Cu3O7âˆ'ÃŽ ´/ La0.67Sr0.33MnO3 Quasi-bilayer Films on SrTiO3 STO Single-crystal Substrates
Published on: April 12, 2019
Related Concept Videos
Ferromagnetism
Colors and Magnetism
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human...
Atomic Nuclei: Nuclear Relaxation Processes
π Electron Effects on Chemical Shift: Overview
Diamagnetism
Diamagnetism was discovered by Anton Brugmans in 1778 when he observed that bismuth gets repelled by magnetic fields, thus theorizing that diamagnets get repelled by magnets....
Atomic Nuclei: Magnetic Resonance