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Title: Anomalies in magnetoelastic properties of DyFe{sub 11.2}Nb{sub 0.8} compound

The structural and magnetic properties of DyFe{sub 11.2}Nb{sub 0.8} compound have been investigated by high intensity, high resolution synchrotron x-ray diffraction, ac magnetic susceptibility, and dc magnetization measurements as well as Mössbauer spectroscopy (5–300 K). The easy magnetization direction at room temperature is along the c-axis. With decreasing temperature, the magnetocrystalline anisotropy changes from easy-axis to easy-cone at T{sub sr2} (∼202 K), then to easy plane at T{sub sr1} (∼94 K). The thermal expansion coefficient obtained from the synchrotron x-ray study exhibits clear anomalies around both of the spin reorientation transition temperatures. The {sup 57}Fe hyperfine interaction parameters and magnetic moments values have been determined for the 8i, 8j, and 8f sites from the Mössbauer spectra.
Authors:
 [1] ;  [2] ; ; ;  [1] ;  [3] ;  [4] ;  [5]
  1. Institute for Superconductivity and Electronic Materials, University of Wollongong, Wollongong, New South Wales 2522 (Australia)
  2. (Australia)
  3. Bragg Institute, ANSTO, Lucas Heights, New South Wales 2234 (Australia)
  4. School of Physical, Environmental and Mathematical Sciences, The University of New South Wales, Canberra, Australian Capital Territory 2600 (Australia)
  5. Australian Synchrotron, 800 Blackburn Rd., Clayton 3168 (Australia)
Publication Date:
OSTI Identifier:
22410000
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; ABSORPTION SPECTRA; ABSORPTION SPECTROSCOPY; ANISOTROPY; CRYSTAL STRUCTURE; DYSPROSIUM ALLOYS; IRON 57; IRON BASE ALLOYS; MAGNETIC MOMENTS; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; MOESSBAUER EFFECT; NIOBIUM ALLOYS; SPIN; TEMPERATURE RANGE 0273-0400 K; THERMAL EXPANSION; TRANSITION TEMPERATURE; X-RAY DIFFRACTION