Microwave soft x-ray microscopy for nanoscale magnetization dynamics in the 5-10 GHz frequency range.

@article{Bonetti2015MicrowaveSX,
  title={Microwave soft x-ray microscopy for nanoscale magnetization dynamics in the 5-10 GHz frequency range.},
  author={Stefano Bonetti and Roopali Kukreja and Zhao Chen and Detlef Spoddig and Katharina Ollefs and Christian Sch{\"o}ppner and Ralf Meckenstock and Andreas Ney and J. Pinto and Richard Houanche and Josef C. Frisch and Joachim St{\"o}hr and Hermann A. D{\"u}rr and Hendrik Ohldag},
  journal={The Review of scientific instruments},
  year={2015},
  volume={86 9},
  pages={
          093703
        }
}
We present a scanning transmission x-ray microscopy setup combined with a novel microwave synchronization scheme for studying high frequency magnetization dynamics at synchrotron light sources. The sensitivity necessary to detect small changes in the magnetization on short time scales and nanometer spatial dimensions is achieved by combining the excitation mechanism with single photon counting electronics that is locked to the synchrotron operation frequency. Our instrument is capable of… 

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References

SHOWING 1-10 OF 27 REFERENCES
X-Ray Detected Magnetic Resonance at Sub-THz Frequencies Using a High Power Gyrotron Source
X-ray Detected Magnetic Resonance (XDMR) is a novel spectroscopy which makes use of X-ray Magnetic Circular Dichroism (XMCD) to probe the resonant precession of local magnetization components in a
Adaption of a diffractometer for time-resolved X-ray resonant magnetic scattering.
TLDR
The combination of the time-resolved set-up with a cryostat in the ALICE chamber will allow temperature-dependent studies of precessional magnetization dynamics and of damping constants to be conducted over a large temperature range and for a large variety of systems in reflection geometry.
Longitudinal detection of ferromagnetic resonance using x-ray transmission measurements.
TLDR
A setup for the x-ray detection of ferromagnetic resonance in the longitudinal geometry using element-specific transmission measurements and the obtained results are interpreted in the framework of a conductivity tensor based formalism.
Sub-micron mapping of GHz magnetic susceptibility using scanning transmission x-ray microscopy
We report submicron imaging (∼0.75 μm resolution) of complex magnetic susceptibility in a micron-size ferromagnetic heterostructure using time-resolved scanning transmission x-ray microscopy. The
Visualization of spin dynamics in single nanosized magnetic elements.
The design of future spintronic devices requires a quantitative understanding of the microscopic linear and nonlinear spin relaxation processes governing the magnetization reversal in nanometer-scale
Magnetization dynamics in an exchange-coupled NiFe/CoFe bilayer studied by x-ray detected ferromagnetic resonance
Exchange-coupled hard and soft magnetic layers find extensive use in data storage applications, for which their dynamical response has great importance. With bulk techniques, such as ferromagnetic
X-Ray Detected Magnetic Resonance: A Unique Probe of the Precession Dynamics of Orbital Magnetization Components
TLDR
The conceptual bases of XDMR are reviewed, and it is suggested that XDMR spectra might be recorded on selected antiferromagnetic crystals for which orbital magnetism is most often ignored in the absence of any supporting experimental evidence.
Detection of microwave phase variation in nanometre-scale magnetic heterostructures.
TLDR
N nanometre-scale, layer-resolved detection of electromagnetic phase through the radio frequency magnetic field H(rf) in magnetic heterostructures, which has implications for the identification of novel effects in spintronics and suggest general possibilities for electromagnetic-phase profile measurement in heterostructure measurement.
Direct observation and imaging of a spin-wave soliton with p-like symmetry
TLDR
Micromagnetic simulations explain the measurements and reveal that the symmetry of the soliton can be controlled by magnetic fields, which broadens the understanding of spin-wave dynamics at the nanoscale, with implications for the design of magnetic nanodevices.
Stochastic limits in synchronous imaging of sub-micron magnetization dynamics using scanning transmission x-ray microscopy
We demonstrate a synchronous (lock-in) technique for imaging thin-film magnetization dynamics using scanning transmission x-ray microscopy (STXM). Gated photon counting synchronized with magnetic
...
1
2
3
...