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Title: Quantitative x-ray magnetic circular dichroism mapping with high spatial resolution full-field magnetic transmission soft x-ray spectro-microscopy

The spectroscopic analysis of X-ray magnetic circular dichroism (XMCD), which serves as strong and element-specific magnetic contrast in full-field magnetic transmission soft x-ray microscopy, is shown to provide information on the local distribution of spin (S) and orbital (L) magnetic moments down to a spatial resolution of 25 nm limited by the x-ray optics used in the x-ray microscope. The spatially resolved L/S ratio observed in a multilayered (Co 0.3 nm/Pt 0.5 nm) × 30 thin film exhibiting a strong perpendicular magnetic anisotropy decreases significantly in the vicinity of domain walls, indicating a non-uniform spin configuration in the vertical profile of a domain wall across the thin film. Quantitative XMCD mapping with x-ray spectro-microscopy will become an important characterization tool for systems with topological or engineered magnetization inhomogeneities.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [5] ;  [1] ;  [6] ;  [1] ;  [2]
  1. Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  2. (United States)
  3. Physics Department, University of California, Berkeley, California 94720 (United States)
  4. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  5. National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  6. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22410071
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; DOMAIN STRUCTURE; LAYERS; MAGNETIC CIRCULAR DICHROISM; MAGNETIC FIELDS; MAGNETIC MOMENTS; MAGNETIZATION; MAPPING; MICROSCOPY; SOFT X RADIATION; SPATIAL RESOLUTION; SPIN; THIN FILMS; TOPOLOGY