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X-ray detected ferromagnetic resonance techniques for the study of magnetization dynamics

DOI: 10.1016/j.nimb.2023.04.005 DOI Help

Authors: Gerrit Van Der Laan (Diamond Light Source) , Thorsten Hesjedal (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Nuclear Instruments And Methods In Physics Research Section B: Beam Interactions With Materials And Atoms , VOL 540 , PAGES 85 - 93

State: Published (Approved)
Published: July 2023

Open Access Open Access

Abstract: Element-specific spectroscopies using synchrotron-radiation can provide unique insights into materials properties. The recently developed technique of X-ray detected ferromagnetic resonance (XFMR) allows studying the magnetization dynamics of magnetic spin structures. Magnetic sensitivity in XFMR is obtained from the X-ray magnetic circular dichroism (XMCD) effect, where the phase of the magnetization precession of each magnetic layer with respect to the exciting radio frequency is obtained using stroboscopic probing of the spin precession. Measurement of both amplitude and phase response in the magnetic layers as a function of bias field can give a clear signature of spin-transfer torque (STT) coupling between ferromagnetic layers due to spin pumping. In the last few years, there have been new developments utilizing X-ray scattering techniques to reveal the precessional magnetization dynamics of ordered spin structures in the GHz frequency range. The techniques of diffraction and reflectometry ferromagnetic resonance (DFMR and RFMR) provide novel ways for the probing of the dynamics of chiral and multilayered magnetic materials, thereby accessing key information relevant to the engineering and development of high-density and low-energy consumption data processing solutions.

Journal Keywords: FMR; XMCD; X-ray scattering; X-ray reflectivity; Spin structures

Diamond Keywords: Ferromagnetism; Spintronics

Subject Areas: Materials, Physics

Instruments: I10-Beamline for Advanced Dichroism

Added On: 26/04/2023 11:49


Discipline Tags:

Surfaces Quantum Materials Physics Electronics Magnetism Materials Science interfaces and thin films

Technical Tags:

Spectroscopy Circular Dichroism (CD) X-ray Magnetic Circular Dichroism (XMCD) X-ray detected Ferromagnetic Resonance (XFMR)