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Related Experiment Videos

Modified magnetism at a buried Co/Pd interface resolved with X-ray standing waves.

S K Kim1, J B Kortright

  • 1Materials Sciences Division, Lawrence Berkeley National Laboratory, University of California, One Cyclotron Road, Berkeley, California 94720, USA.

Physical Review Letters
|February 15, 2001
PubMed
Summary

Soft x-ray standing waves reveal localized changes in cobalt magnetism at the cobalt-on-palladium interface. This technique enhances understanding of magnetic anisotropy in thin films and interfaces.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Surface Science

Background:

  • Understanding magnetism at interfaces is crucial for developing advanced magnetic devices.
  • Traditional methods often lack the depth resolution to probe interfacial magnetic properties accurately.

Purpose of the Study:

  • To investigate depth-dependent changes in cobalt magnetism within a palladium/cobalt/palladium trilayer.
  • To explore the magnetic properties at the nanoscale interface between cobalt and palladium.

Main Methods:

  • Utilized soft x-ray standing waves generated by a multilayer interference substrate.
  • Applied magnetic circular dichroism (MCD) spectroscopy with enhanced depth sensitivity.
  • Analyzed a palladium/cobalt/palladium trilayer with in-plane magnetization.

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Main Results:

  • Resolved magnetic changes in cobalt within a 1 nm distance from the cobalt-on-palladium interface.
  • Observed significant enhancements in cobalt d holes, and in-plane orbital and spin magnetic moments.
  • These enhancements were localized to a thin, chemically modified interface layer.

Conclusions:

  • Soft x-ray standing waves provide depth sensitivity for probing interface magnetism.
  • Chemically modified interfaces exhibit distinct magnetic properties, impacting magnetic anisotropy.
  • This technique offers broad applicability for studying magnetism in layered materials and interfaces.