Ultrafast magnetic switching of GdFeCo with electronic heat currents

  title={Ultrafast magnetic switching of GdFeCo with electronic heat currents},
  author={Robert B. Wilson and Jon Gorchon and Yang Yang and C-H. Lambert and Sayeef S. Salahuddin and Jeffrey Bokor},
  journal={Physical Review B},
Author(s): Wilson, RB; Gorchon, J; Yang, Y; Lambert, CH; Salahuddin, S; Bokor, J | Abstract: © 2017 American Physical Society. We report the magnetic response of Pt/Au/GdFeCo trilayers to optical irradiation of the Pt surface. For trilayers with Au thickness greater than 50 nm, the great majority of energy is absorbed by the Pt layer, creating an initial temperature differential of thousands of kelvin between the Pt/Au layers and the GdFeCo layer. The resulting electronic heat current across… 

Magnetization switching by nanosecond pulse of electric current in thin ferrimagnetic film near compensation temperature

We report on a theoretical study of thermal magnetization switching induced by nanosecond electric current pulse using Lagrangian formalism based on the Landau–Lifshitz–Gilbert equation. The

Title: Single shot ultrafast all optical magnetization switching of ferromagnetic Co/Pt multilayers

: A single femto-second optical pulse can fully reverse the magnetization of a film within picoseconds. Such fast operation hugely increases the range of application of magnetic devices. However, so

Roles of heating and helicity in ultrafast all-optical magnetization switching in TbFeCo

Using time-resolved magneto-optical Kerr effect (TR-MOKE) method, helicity-dependent all-optical magnetization switching (HD-AOS) is observed in ferrimagnetic TbFeCo films. The thermal effect and

Laser-driven spin generation in the conduction bands of ferrimagnetic metals

Ferrimagnetic metals show an extraordinary phenomenon of all-optical switching of magnetization. Ongoing research has revealed the relevant physics of crossing a compensation temperature, occurrence

Picosecond acoustic-excitation-driven ultrafast magnetization dynamics in dielectric Bi-substituted yttrium iron garnet

Using femtosecond optical pulses, we have investigated the ultrafast magnetization dynamics induced in a dielectric film of bismuth-substituted yttrium iron garnet (Bi-YIG) buried below a thick Cu/Pt

Single shot all optical switching of intrinsic micron size magnetic domains of a Pt/Co/Pt ferromagnetic stack

We demonstrate that the magnetization reversal in a ferromagnetic Pt/Co/Pt stack can be induced by a single femtosecond laser pulse. We find that the size of the switched spot is comparable to the

Temperature-Dependent Magnetization Switching in FeGd Ferrimagnets

Laser-induced magnetization switching in GdFe ferrimagnets strongly depends on the pulse duration. To gain insight into the ferrimagnetic switching process, Landau–Lifshitz–Gilbert (LLG) spin dynamic

Single shot ultrafast all optical magnetization switching of ferromagnetic Co/Pt multilayers

  • J. GorchonC. Lambert J. Bokor
  • Physics
    2017 Fifth Berkeley Symposium on Energy Efficient Electronic Systems & Steep Transistors Workshop (E3S)
  • 2017
The ability to control magnetism in sub-picosecond timescales using laser pulses has potential applications in fast magnetic devices. It has been demonstrated that a single femto-second laser pulse

Engineering Single-Shot All-Optical Switching of Ferromagnetic Materials.

This work investigates single-shot all-optical magnetization switching in a GdFeCo/Cu/[CoxNi1-x/Pt] spin-valve structure and demonstrates that the threshold fluence for switching both the Gd FeCo and the ferromagnetic layer depends on the laser pulse duration and the thickness and the Curie temperature of the feromagnetic layer.



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

Electron-phonon interaction during optically induced ultrafast magnetization dynamics of Au/GdFeCo bilayers

The temperature evolution of GdFeCo electrons following optical heating plays a key role in all optical switching of GdFeCo and is primarily governed by the strength of coupling between electrons and

I and J

Journal of Applied Physics 115

  • 172611
  • 2014

Reports on Progress in Physics 76

  • 026501
  • 2013

Applied Physics Letters 107

  • 192402
  • 2015

Nature communications 3

  • 1037
  • 2012

Nat Mater 13

  • 101
  • 2014

Nature 472

  • 205
  • 2011

Physical Review Letters 63

  • 1989