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Title: Magnetization reversal of a Nd-Cu-infiltrated Nd-Fe-B nanocrystalline magnet observed with small-angle neutron scattering

The magnetization reversal process of Nd-Fe-B nanocrystalline magnets infiltrated with Nd-Cu alloy was examined using small-angle neutron scattering (SANS). The magnetic-field dependence of SANS intensity revealed a qualitative difference between Nd-Cu-infiltrated samples and as-deformed samples. Insufficient magnetic isolation along the direction perpendicular to the nominal c-axis is expected from comparable SANS intensities for different ranges of q values along this direction. For small q values near the coercivity field, Nd-Cu-infiltrated samples show a noticeable reduction in SANS intensity along the nominal c-axis, which is parallel to the external magnetic field. This indicates less spatial fluctuation of magnetic moments in Nd-Cu-infiltrated samples, owing to magnetically isolated Nd{sub 2}Fe{sub 14}B grains.
Authors:
;  [1] ;  [2] ; ; ; ; ;  [3] ;  [4] ;  [5]
  1. Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, 305-0803 Tsukuba (Japan)
  2. Elements Strategy Initiative Center for Magnetic Materials, National Institute for Materials Science, 1-2-1 Sengen, 305-0047 Tsukuba (Japan)
  3. Toyota Motor Corporation, Toyota, Aichi 471-8571 (Japan)
  4. Toyota Central R and D Labs, Inc., Aichi 480-1192 (Japan)
  5. Helmholtz-Zentrum Berlin für Materialien and Energie, 14109 Berlin (Germany)
Publication Date:
OSTI Identifier:
22409945
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:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BORON ALLOYS; COERCIVE FORCE; COMPARATIVE EVALUATIONS; COPPER ALLOYS; CRYSTALS; FLUCTUATIONS; IRON ALLOYS; MAGNETIC FIELDS; MAGNETIC MATERIALS; MAGNETIC MOMENTS; MAGNETIZATION; MAGNETS; NANOSTRUCTURES; NEODYMIUM ALLOYS; NEUTRON DIFFRACTION; SMALL ANGLE SCATTERING