Unlocking the Secret Nanostructures of Magnetic Materials With the Right Illumination — Researchers from the Max B |
Artist’s impression of the XMCD experiment. The soft-x-ray light from a plasma source is first circularly polarized by the transmission through a magnetic film. Subsequently, the magnetization in the actual sample can be determined accurately. Credit: Christian Tzschaschel
Magnetic nanostructures have long been part of our everyday life, e.g., in the form of fast and compact data storage devices or highly sensitive sensors. A major contribution to the understanding of many of the relevant magnetic effects and functionalities is made by a special measurement method: X-ray Magnetic Circular Dichroism .
The XMCD effect allows for precisely determining the magnetic moment of the respective elements, even in buried layers in a material and without damaging the sample system. If the circularly polarized soft-x-ray radiation comes in very short femto- to picosecond pulses, even ultrafast magnetization processes can be monitored on the relevant time scale.
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