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Title: Uniaxial in-plane magnetization of iron nanolayers grown within an amorphous matrix

Conversion electron Mössbauer spectroscopy is used to determine the magnetic ground state at zero magnetic field of four-monolayer thick amorphous iron layers as part of a CoFeB-Fe multilayer stack. By comparing the intensities of the magnetic hyperfine field, an easy in-plane axis of the amorphous embedded Fe layer is verified, which is collinear to the uniaxial anisotropy axis of the neighboring amorphous CoFeB. Despite the soft magnetic character of the Fe layers, external fields up to 4 T perpendicular to the film plane are insufficient to completely align the embedded Fe moments parallel to the magnetic field due to a local disorder of the magnetic moments of the Fe atoms.
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6]
  1. Herbert Gleiter Institute of Nanoscience, Nanjing University of Science and Technology, Nanjing 210094 (China)
  2. (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
  3. Leibniz Institute for Photonic Technology IPHT, Jena (Germany)
  4. Institute for Materials Science, Kiel University Kiel, Kaiserstraße 2, 24143 Kiel (Germany)
  5. Institute of Nanotechnology, Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen (Germany)
  6. Laboratório de Física Aplicada, Centro de Desenvolvimento da Tecnologia Nuclear (CDTN), 31270-901 Belo Horizonte, MG (Brazil)
Publication Date:
OSTI Identifier:
22310902
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 7; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; AMORPHOUS STATE; ANISOTROPY; ATOMS; BORON COMPOUNDS; COBALT COMPOUNDS; ELECTRONS; FILMS; GROUND STATES; IRON; IRON COMPOUNDS; LAYERS; MAGNETIC FIELDS; MAGNETIC MOMENTS; MAGNETIZATION; MOESSBAUER EFFECT; NANOSTRUCTURES; SPECTROSCOPY; TERNARY ALLOY SYSTEMS