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Title: Observation of spin-wave dispersion in Nd-Fe-B magnets using neutron Brillouin scattering

The low-energy spin-wave dispersion in polycrystalline Nd-Fe-B magnets was observed using neutron Brillouin scattering (NBS). Low-energy spin-wave excitations for the lowest acoustic spin-wave mode were clearly observed. From the spin-wave dispersion, we were able to determine the spin-wave stiffness constant D{sub sw} (100.0 ± 4.9 meV.Å{sup 2}) and the exchange stiffness constant A (6.6 ± 0.3 pJ/m)
Authors:
; ; ; ; ; ;  [1] ; ; ; ;  [2] ;  [3]
  1. Institute of Materials Structure Science, High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801 (Japan)
  2. Toyota Motor Corporation, Toyota, Aichi 471-8571 (Japan)
  3. Toyota Central R and D Labs. Inc., Aichi 480-1192 (Japan)
Publication Date:
OSTI Identifier:
22273859
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; BRILLOUIN EFFECT; EXCITATION; FLEXIBILITY; IRON BORIDES; MAGNETIC MATERIALS; MAGNETS; NEODYMIUM COMPOUNDS; NEUTRON DIFFRACTION; POLYCRYSTALS; SPIN WAVES