Skip to Main content Skip to Navigation
Journal articles

Laser-induced ultrafast demagnetization and perpendicular magnetic anisotropy reduction in a Co88Tb12 thin film with stripe domains

Abstract : We use time-resolved x-ray resonant magnetic scattering (TR-XRMS) at the Co M2,3 and Tb O1 edges to study ultrafast demagnetization in an amorphous Co88Tb12 alloy with stripe domains. Combining the femtosecond temporal with nanometer spatial resolution of our experiment, we demonstrate that the equilibrium spin texture of the thin film remains unaltered by the optical pump pulse on ultrashort timescales (<1ps). However, after ≃4 ps, we observe the onset of a significant domain wall broadening, which we attribute to a reduction of the uniaxial magnetic anisotropy of the system, due to energy transfer to the lattice. Static temperature-dependent magnetometry measurements combined with analytical modeling of the magnetic structure of the thin film corroborate this interpretation
Complete list of metadata

https://hal.univ-lorraine.fr/hal-03032944
Contributor : Gregory Malinowski <>
Submitted on : Tuesday, December 1, 2020 - 10:24:03 AM
Last modification on : Thursday, September 2, 2021 - 10:59:42 AM
Long-term archiving on: : Tuesday, March 2, 2021 - 6:37:31 PM

File

2020 - Hennes - Laser induced ...
Publisher files allowed on an open archive

Identifiers

Citation

Marcel Hennes, Aladine Merhe, Xuan Liu, D. Weder, C Schmising, et al.. Laser-induced ultrafast demagnetization and perpendicular magnetic anisotropy reduction in a Co88Tb12 thin film with stripe domains. Physical Review B, American Physical Society, 2020, 102, pp.174437. ⟨10.1103/physrevb.102.174437⟩. ⟨hal-03032944⟩

Share

Metrics

Record views

181

Files downloads

225