Related Experiment Video
Updated: Apr 11, 2026

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
Published on: December 18, 2016
Time-resolved imaging of pulse-induced magnetization reversal with a microwave assist field
Siddharth Rao1, Jan Rhensius1, Andre Bisig2
1Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore.
Abstract:
The reversal of the magnetization under the influence of a field pulse has been previously predicted to be an incoherent process with several competing phenomena such as domain wall relaxation, spin wave-mediated instability regions, and vortex-core mediated reversal dynamics. However, there has been no study on the direct observation of the switching process with the aid of a microwave signal input. We report a time-resolved imaging study of magnetization reversal in patterned magnetic structures under the influence of a field pulse with microwave assistance. The microwave frequency is varied to demonstrate the effect of resonant microwave-assisted switching. We observe that the switching process is dominated by spin wave dynamics generated as a result of magnetic instabilities in the structures, and identify the frequencies that are most dominant in magnetization reversal.
More Related Videos
09:59A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
Published on: September 16, 2017
08:01Rapid Scan Electron Paramagnetic Resonance Opens New Avenues for Imaging Physiologically Important Parameters In Vivo
Published on: September 26, 2016
Related Concept Videos
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
Magnetic Resonance Imaging
Atomic Nuclei: Magnetic Resonance
Atomic Nuclei: Nuclear Relaxation Processes
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
NMR Spectrometers: Resolution and Error Correction