Magnetization and Microstructure Dynamics in Fe/MnAs/GaAs(001): Fe Magnetization Reversal by a Femtosecond Laser Pulse - Archive ouverte HAL Access content directly
Journal Articles Physical Review Letters Year : 2014

Magnetization and Microstructure Dynamics in Fe/MnAs/GaAs(001): Fe Magnetization Reversal by a Femtosecond Laser Pulse

A. Ciavardini
  • Function : Author
E. Pedersoli
I. Nikolov
H. Popescu
  • Function : Author
G. de Ninno
  • Function : Author

Abstract

Thin film magnetization reversal without applying external fields is an attractive perspective for applications in sensors and devices. One way to accomplish it is by fine-tuning the microstructure of a magnetic substrate via temperature control, as in the case of a thin Fe layer deposited on a MnAs/GaAs(001) template. This work reports a time-resolved resonant scattering study exploring the magnetic and structural properties of the Fe/MnAs system, using a 100 fs optical laser pulse to trigger local temperature variations and a 100 fs x-ray free-electron laser pulse to probe the induced magnetic and structural dynamics. The experiment provides direct evidence that a single optical laser pulse can reverse the Fe magnetization locally. It reveals that the time scale of the magnetization reversal is slower than that of the MnAs structural transformations triggered by the optical pulse, which take place after a few picoseconds already.
Fichier principal
Vignette du fichier
PhysRevLett.113.247202-accepted.pdf (1.66 Mo) Télécharger le fichier
Origin Files produced by the author(s)

Dates and versions

hal-01240513 , version 1 (02-02-2024)

Identifiers

Cite

C. Spezzani, E. Ferrari, E. Allaria, Franck Vidal, A. Ciavardini, et al.. Magnetization and Microstructure Dynamics in Fe/MnAs/GaAs(001): Fe Magnetization Reversal by a Femtosecond Laser Pulse. Physical Review Letters, 2014, 113 (24), pp.247202. ⟨10.1103/PhysRevLett.113.247202⟩. ⟨hal-01240513⟩
67 View
14 Download

Altmetric

Share

Gmail Mastodon Facebook X LinkedIn More