Related Experiment Video
Updated: Jul 7, 2026

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity
Published on: March 6, 2017
Microwave-assisted switching of microscopic rings: correlation between nonlinear spin dynamics and critical microwave
Jan Podbielski1, Detlef Heitmann, Dirk Grundler
1Institut für Angewandte Physik und Mikrostrukturforschungszentrum, Universität Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany. jpodbiel@physnet.uni-hamburg.de
Abstract:
We have studied the spin dynamics of microscopic permalloy rings at GHz frequencies. Increasing the irradiation power, we observe first nonlinear spin dynamics and second microwave-assisted switching (MAS). We explore the MAS phase diagram as a function of microwave power and frequency f and, in particular, extract the critical microwave field hc(f). Its frequency dependence reflects characteristic eigenfrequencies from both the linear and nonlinear spin-wave spectrum. By comparing hc(f) with the different susceptibilities, we gain insight into the microscopic processes which might be the basis of a predictive theory of MAS.
Related Concept Videos
Atomic Nuclei: Nuclear Relaxation Processes
Atomic Nuclei: Nuclear Spin State Overview
Atomic Nuclei: Magnetic Resonance
Atomic Nuclei: Nuclear Spin State Population Distribution
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Standing Waves in a Cavity

