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X-rays and magnetism.

Peter Fischer1, Hendrik Ohldag

  • 1Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, CA 94720, USA. Physics Department, University of California Santa Cruz, 1156 High St, Santa Cruz, CA 94056, USA.

Reports on Progress in Physics. Physical Society (Great Britain)
|August 21, 2015
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Summary
This summary is machine-generated.

Advanced magnetic materials are studied using polarized X-rays, enabling nanoscale imaging and ultrafast dynamics. These techniques offer new insights into magnetic phenomena for fundamental research and technological applications.

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Area of Science:

  • Solid state physics
  • Materials science
  • Condensed matter physics

Background:

  • Magnetism is a key area in modern physics with fundamental research and technological importance.
  • Advanced magnetic materials, including hybrid structures, offer novel functionalities.
  • Characterizing magnetic materials requires element, valence, and site-sensitive probes.

Purpose of the Study:

  • To review contemporary nanoscale magnetic materials.
  • To provide an overview of analytical spectroscopy and microscopy tools based on X-ray dichroism.
  • To highlight the potential and future directions of X-ray-based magnetic characterization techniques.

Main Methods:

  • Utilizing polarized X-rays as unique probes for magnetic materials.
  • Employing a variety of spectroscopic and microscopic techniques based on X-ray dichroism.
  • Leveraging next-generation X-ray facilities for enhanced resolution and time-window.

Main Results:

  • Spectroscopic and microscopic techniques quantify spin/orbital moments in magnetic systems.
  • Nanoscale spin textures and dynamics are imaged with sub-nanosecond time and ~10 nm spatial resolution.
  • Future X-ray facilities will enable attosecond (asec) time-scale magnetic studies with nanometer resolution.

Conclusions:

  • Polarized X-ray techniques are essential for characterizing advanced magnetic materials.
  • X-ray dichroism-based methods provide detailed insights into magnetic properties.
  • Ultrafast X-ray studies will push the frontiers of magnetism research.