Ultrafast magnetization enhancement in metallic multilayers driven by superdiffusive spin current

Dennis Rudolf, Chan La-O-Vorakiat, Marco Battiato, Roman Adam (), Justin M. Shaw, Emrah Turgut, Pablo Maldonado, Stefan Mathias, Patrik Grychtol, Hans T. Nembach, Thomas J. Silva, Martin Aeschlimann, Henry C. Kapteyn, Margaret M. Murnane, Claus M. Schneider and Peter M. Oppeneer
Additional contact information
Dennis Rudolf: Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich
Chan La-O-Vorakiat: University of Colorado and NIST
Marco Battiato: Uppsala University
Roman Adam: Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich
Justin M. Shaw: National Institute of Standards and Technology
Emrah Turgut: University of Colorado and NIST
Pablo Maldonado: Uppsala University
Stefan Mathias: University of Colorado and NIST
Patrik Grychtol: Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich
Hans T. Nembach: National Institute of Standards and Technology
Thomas J. Silva: National Institute of Standards and Technology
Martin Aeschlimann: University of Kaiserslautern and Research Center OPTIMAS
Henry C. Kapteyn: University of Colorado and NIST
Margaret M. Murnane: University of Colorado and NIST
Claus M. Schneider: Peter Grünberg Institut PGI-6 & JARA-FIT, Research Centre Jülich
Peter M. Oppeneer: Uppsala University

Nature Communications, 2012, vol. 3, issue 1, 1-6

Abstract: Abstract Uncovering the physical mechanisms that govern ultrafast charge and spin dynamics is crucial for understanding correlated matter as well as the fundamental limits of ultrafast spin-based electronics. Spin dynamics in magnetic materials can be driven by ultrashort light pulses, resulting in a transient drop in magnetization within a few hundred femtoseconds. However, a full understanding of femtosecond spin dynamics remains elusive. Here we spatially separate the spin dynamics using Ni/Ru/Fe magnetic trilayers, where the Ni and Fe layers can be ferro- or antiferromagnetically coupled. By exciting the layers with a laser pulse and probing the magnetization response simultaneously but separately in Ni and Fe, we surprisingly find that optically induced demagnetization of the Ni layer transiently enhances the magnetization of the Fe layer when the two layer magnetizations are initially aligned parallel. Our observations are explained by a laser-generated superdiffusive spin current between the layers.

Date: 2012
References: Add references at CitEc
Citations: View citations in EconPapers (4)

Downloads: (external link)
https://www.nature.com/articles/ncomms2029 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms2029

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms2029

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().