Depth-resolved magnetization dynamics revealed by X-ray reflectometry ferromagnetic resonance

DOI: 10.1103/PhysRevLett.125.137201

Authors: D. M. Burn (Diamond Light Source) , S. l. Zhang (ShanghaiTech University) , G. q. Yu (Institute of Physics, Chinese Academy of Sciences) , Y. Guang (Institute of Physics, Chinese Academy of Sciences) , H. j. Chen (Tongji University) , X. p. Qiu (Tongji University) , Gerrit Van Der Laan (Diamond Light Source) , T. Hesjedal (University of Oxford)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 125 , PAGES 137201

State: Published (Approved)
Published: September 2020
Diamond Proposal Number(s): 23895

Abstract: Magnetic multilayers offer diverse opportunities for the development of ultrafast functional devices through advanced interface and layer engineering. Nevertheless, a method for determining their dynamic properties as a function of depth throughout such stacks has remained elusive. By probing the ferromagnetic resonance modes with element-selective soft x-ray resonant reflectivity, we gain access to the magnetization dynamics as a function of depth. Most notably, using reflectometry ferromagnetic resonance, we find a phase lag between the coupled ferromagnetic layers in [CoFeB/MgO/Ta]4 multilayers that is invisible to other techniques. The use of reflectometry ferromagnetic resonance enables the time-resolved and depth-resolved probing of the complex magnetization dynamics of a wide range of functional magnetic heterostructures with absorption edges in the soft x-ray wavelength regime.

Journal Keywords: XMCD; spintronics; magnetic spectroscopy

Diamond Keywords: Ferromagnetism

Subject Areas: Physics, Materials, Technique Development

Diamond Offline Facilities: Magnetic Spectroscopy Lab
Instruments: I10-Beamline for Advanced Dichroism

Added On: 25/09/2020 12:36

Documents:
PhysRevLett.125.137201.pdf

Discipline Tags:

Quantum Materials Hard condensed matter - electronic properties Physics Technique Development - Physics Magnetism Materials Science

Technical Tags:

Scattering Resonant Soft X-ray Scattering (RSXS)