Change search
ReferencesLink to record
Permanent link

Direct link
Microscopic Model for Ultrafast Remagnetization Dynamics
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Applied Material Physics.ORCID iD: 0000-0003-4341-5663
Show others and affiliations
2012 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 109, no 15, 157201- p.Article in journal (Refereed) Published
Abstract [en]

In this Letter, we provide a microscopic model for the ultrafast remagnetization of atomic moments already quenched above the Stoner-Curie temperature by a strong laser fluence. Combining first-principles density functional theory, atomistic spin dynamics utilizing the Landau-Lifshitz-Gilbert equation, and a three-temperature model, we analyze the temporal evolution of atomic moments as well as the macroscopic magnetization of bcc Fe and hcp Co covering a broad time scale, ranging from femtoseconds to picoseconds. Our simulations show a variety of complex temporal behavior of the magnetic properties resulting from an interplay between electron, spin, and lattice subsystems, which causes an intricate time evolution of the atomic moment, where longitudinal and transversal fluctuations result in a macrospin moment that evolves highly nonmonotonically.

Place, publisher, year, edition, pages
2012. Vol. 109, no 15, 157201- p.
Keyword [en]
Transition-Metals, Spin Dynamics, Demagnetization, Magnetism, Electrons
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-105001DOI: 10.1103/PhysRevLett.109.157201ISI: 000309590300042ScopusID: 2-s2.0-84867320886OAI: diva2:569995
Swedish Research CouncilKnut and Alice Wallenberg FoundationeSSENCE - An eScience CollaborationSwedish eā€Science Research Center

QC 20121116

Available from: 2012-11-16 Created: 2012-11-15 Last updated: 2013-04-08Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Bergqvist, Lars
By organisation
Applied Material Physics
In the same journal
Physical Review Letters
Physical Sciences

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 287 hits
ReferencesLink to record
Permanent link

Direct link