Ultrafast spin-transfer torque driven by femtosecond pulsed-laser excitation

A.J. Schellekens, K.C. Kuiper, R.R.J.C. de Wit, B. Koopmans

Research output: Contribution to journalArticleAcademicpeer-review

65 Citations (Scopus)

Abstract

Spin currents have an important role in many proposed spintronic devices, as they govern the switching process of magnetic bits in random access memories or drive domain wall motion in magnetic shift registers. The generation of these spin currents has to be fast and energy efficient for realization of these envisioned devices. Recently it has been shown that femtosecond pulsed-laser excitation of thin magnetic films creates intense and ultrafast spin currents. Here we utilize this method to change the orientation of the magnetization in a magnetic bilayer by spin-transfer torque on sub-picosecond timescales. By analysing the dynamics of the magnetic bilayer after laser excitation, the rich physics governing ultrafast spin-transfer torque are elucidated opening up new pathways to ultrafast magnetization reversal, but also providing a new method to quantify optically induced spin currents generated on femtosecond timescales.
LanguageEnglish
Article number4333
JournalNature Communications
Volume5
DOIs
StatePublished - 2014

Fingerprint

Laser excitation
Torque
Pulsed lasers
torque
pulsed lasers
Lasers
Magnetic thin films
Magnetization reversal
Equipment and Supplies
Magnetoelectronics
Shift registers
Domain walls
Physics
excitation
Magnetization
Data storage equipment
shift registers
magnetization
magnetic films
random access memory

Cite this

Schellekens, A.J. ; Kuiper, K.C. ; de Wit, R.R.J.C. ; Koopmans, B./ Ultrafast spin-transfer torque driven by femtosecond pulsed-laser excitation. In: Nature Communications. 2014 ; Vol. 5.
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Ultrafast spin-transfer torque driven by femtosecond pulsed-laser excitation. / Schellekens, A.J.; Kuiper, K.C.; de Wit, R.R.J.C.; Koopmans, B.

In: Nature Communications, Vol. 5, 4333, 2014.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Koopmans,B.

PY - 2014

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