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Researchers developed a tunable magnetic sample environment using permanent magnets for advanced material characterization. This system offers precise control over magnetic fields up to 415 mT, enhancing X-ray microscopy of magnetic materials.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Magnetism

Background:

  • Adjustable magnetic fields are crucial for advanced material characterization.
  • Permanent magnet assemblies offer energy efficiency and reduced heating compared to electromagnets.
  • Developing tunable magnetic environments is essential for in-situ studies.

Purpose of the Study:

  • To develop and integrate a tunable magnetic sample environment at the SoftiMAX beamline, MAX IV synchrotron.
  • To utilize a novel "magnetic mangles" configuration with permanent magnets for precise field control.
  • To investigate the performance and capabilities of this system for magnetic material analysis.

Main Methods:

  • Implementation of a "magnetic mangles" setup with four diametrically magnetized NdFeB permanent magnets.
  • Exploration of in-plane, out-of-plane, and tilted (30°) magnetic field configurations.
  • Analysis of field uniformity, strength (up to 415 mT), and hysteretic behavior under various orientations and field sweeps.
  • Demonstration of system performance using X-ray microscopy on Co nanochains and CoGd thin films.

Main Results:

  • The tunable magnetic environment achieved field strengths up to 415 mT with precise control over orientation.
  • Field uniformity was highest at maximum field strengths and decreased towards zero field.
  • Analysis revealed hysteretic behavior and field uniformity characteristics across different field orientations and sweeping configurations.
  • Successful X-ray microscopy experiments showcased the system's ability to probe magnetic domain structures and magnetization reversal.

Conclusions:

  • The developed tunable magnetic sample environment provides precise and adjustable magnetic fields for advanced material characterization.
  • The
  • magnetic mangles
  • configuration using permanent magnets is effective for in-situ studies.
  • The system enables detailed investigation of magnetic properties and phenomena in materials like cobalt-based nanostructures and thin films.