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Title: Thermal and soft magnetic properties of Co{sub 40}Fe{sub 22}Ta{sub 8}B{sub 30} glassy particles: In-situ X-ray diffraction and magnetometry studies

The structural evolution of Co{sub 40}Fe{sub 22}Ta{sub 8}B{sub 30} glassy particles has been studied by in-situ high-energy synchrotron X-ray diffraction (XRD) upon isochronal annealing. The changes in position, intensity, and full width at half maximum (FWHM) of the first and second diffuse maxima of the XRD patterns suggest the occurrence of irreversible structural relaxation upon the first heating up to a temperature close to the glass transition temperature T{sub g}. The variations in reduced pair correlation functions upon annealing are discussed in the frame of the topological fluctuation theory for structural relaxation. Isochronal annealing of the Co{sub 40}Fe{sub 22}Ta{sub 8}B{sub 30} glassy particles improves their soft magnetic properties through decreasing the coercivity and increasing the magnetic susceptibility, saturation magnetization, and Curie temperature.
Authors:
 [1] ;  [2] ;  [3] ; ;  [2] ;  [4] ;  [5]
  1. Department of Materials Science and Engineering, Shiraz University of Technology, Shiraz (Iran, Islamic Republic of)
  2. IFW Dresden, Institute for Complex Materials, Helmholtzstr. 20, 01069 Dresden (Germany)
  3. (Romania)
  4. (Germany)
  5. Photon Science DESY, Notkestraße 85, 22603 Hamburg (Germany)
Publication Date:
OSTI Identifier:
22314575
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 5; Other Information: (c) 2014 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; ANNEALING; BORON 8; COERCIVE FORCE; CORRELATION FUNCTIONS; CURIE POINT; FLUCTUATIONS; GLASS; HEATING; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; PARTICLES; RELAXATION; SATURATION; SYNCHROTRONS; X-RAY DIFFRACTION