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Title: Investigation of coercivity mechanism in hot deformed Nd-Fe-B permanent magnets by small-angle neutron scattering

The magnetic reversal behaviors of single domain sized Nd-Fe-B permanent magnets, with and without isolation between the Nd{sub 2}Fe{sub 14}B grains, was clarified using small-angle neutron scattering (SANS). The SANS patterns obtained arose from changes in the magnetic domains and were analyzed using the Teubner–Stray model, a phenomenological correlation length model, to quantify the periodicity and morphology of the magnetic domains. The results indicated that the magnetic reversal evolved with the magnetic domains that had similar sized grains. The grain isolation enabled us to realize the reversals of single domains.
Authors:
; ; ;  [1] ;  [2] ;  [3] ;  [4]
  1. Advanced Material Engineering Division, Toyota Motor Corporation, Susono 410-1193 (Japan)
  2. High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 (Japan)
  3. Toyota Central R and D Labs, Inc., Aichi 480-1192 (Japan)
  4. Laboratory for Neutron Scattering, Paul Scherrer Institut, 5232 Villigen PSI (Switzerland)
Publication Date:
OSTI Identifier:
22273796
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 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; COERCIVE FORCE; CORRELATIONS; DOMAIN STRUCTURE; IRON BORIDES; MAGNETIC MATERIALS; MORPHOLOGY; NEODYMIUM COMPOUNDS; NEUTRON DIFFRACTION; PERIODICITY; PERMANENT MAGNETS; SMALL ANGLE SCATTERING