Ultra-low energy threshold engineering for all-optical switching of magnetization in dielectric-coated Co/Gd based synthetic-ferrimagnet

  title={Ultra-low energy threshold engineering for all-optical switching of magnetization in dielectric-coated Co/Gd based synthetic-ferrimagnet},
  author={Pingzhi Li and Mark J.G. Peeters and Youri L. W. van Hees and Reinoud Lavrijsen and Bert Koopmans},
  journal={Applied Physics Letters},
A femtosecond laser pulse is able to switch the magnetic state of a 3d-4f ferrimagnetic material on a picosecond time scale. Devices based on this all-optical switching (AOS) mechanism are competitive candidates for ultrafast memory applications. However, a large portion of the light energy is lost by reflection from the metal thin film as well as transmission to the substrate. In this paper, we explore the use of dielectric coatings to increase the light absorption by the magnetic metal layer… 

Figures from this paper


Single-shot all-optical switching of magnetization in Tb/Co multilayer-based electrodes
The development of perpendicular magnetic tunnel junctions incorporating a stack of Tb/Co nanolayers whose magnetization can be all-optically controlled via helicity-independent single-shot switching is reported, offering a technologically-viable path towards the realization of hybrid spintronic-photonic systems featuring THz switching speeds.
Integration platform for optical switching of magnetic elements
We present a detailed investigation of a novel platform for integration of spintronic memory elements and a photonic network, for future ultrafast and energy-efficient memory. We designed and
Integration of Tb/Co multilayers within optically switchable perpendicular magnetic tunnel junctions
This work reports the development of perpendicular magnetic tunnel junctions, based on a multilayered stack of [Tb/Co] nanolayers, in which the magnetization can be reliably toggled using a single
Deterministic all-optical switching of synthetic ferrimagnets using single femtosecond laser pulses
We experimentally demonstrate single-pulse all-optical switching in Pt/Co/Gd stacks using linearly polarized laser pulses. This shows that thermal single-pulse switching is not limited to
Integrating all-optical switching with spintronics
On-the-fly single-pulse AOS in combination with spin Hall effect (SHE) driven motion of magnetic domains in Pt/Co/Gd synthetic-ferrimagnetic racetracks is experimentally demonstrated.
Role of electron and phonon temperatures in the helicity-independent all-optical switching of GdFeCo
Author(s): Gorchon, J; Wilson, RB; Yang, Y; Pattabi, A; Chen, JY; He, L; Wang, JP; Li, M; Bokor, J | Abstract: ©2016 American Physical Society. Ultrafast optical heating of the electrons in
Ultrafast magnetization reversal by picosecond electrical pulses
Deterministic, repeatable ultrafast reversal of the magnetization of a GdFeCo thin film with a single sub–10-ps electrical pulse is observed, demonstrating a fundamentally new electrical switching mechanism that does not require spin-polarized currents or spin-transfer/orbit torques.
Writing magnetic memory with ultrashort light pulses
Laser pulses are the shortest stimulus known to control the magnetization of materials and to switch magnetic devices on the picosecond to femtosecond timescales. Femtosecond laser pulses have been