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Title: Detailed study of the magnetic ordering in FeMnP{sub 0.75}Si{sub 0.25}

Magnetic and crystallographic properties of FeMnP{sub 0.75}Si{sub 0.25} in the hexagonal Fe{sub 2}P-type structure have been investigated by X-ray powder diffraction, neutron powder diffraction and magnetic measurements. The room temperature diffractograms reveal co-existence of two distinct structural phases in the samples with small, but significant, differences only in the unit cell dimensions. The volume ratio between the two phases is governed by the annealing conditions. One of the phases orders ferromagnetically (T{sub C}=250 K) and the other in an incommensurate antiferromagnetic structure at low temperatures (q{sub x}=0.363(1), T{sub N}=150 K). - Graphical abstract: The ferromagnetic structure of sample I (a) and the antiferromagnetic and incommensurate (q{sub x}=0.363(1)) low temperature structure of sample II (b). The magnetic moments of the Mn and Fe atoms in (b) are aligned in the basal plane along the a- and the b-axis, respectively, and the amplitude of the moments propagates sinusoidally along the a-axis. - Highlights: • Magnetic and crystallographic properties of FeMnP{sub 0.75}Si{sub 0.25} have been investigated. • Co-existing ferro- and antiferromagnetic ordering arise from two phases of Fe{sub 2}P-type. • A low temperature incommensurate antiferromagnetic structure is revealed.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [3] ;  [5] ;  [6] ;  [7] ; ;  [1]
  1. Department of Chemistry – The Angstrom Laboratory, Uppsala University, Uppsala (Sweden)
  2. ICT Materials Physics, KTH Royal Institute of Technology, Kista (Sweden)
  3. (Sweden)
  4. Fundamental Aspects of Materials and Energy, Faculty of Applied Sciences, TU Delft, Delft (Netherlands)
  5. Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Rez (Czech Republic)
  6. Physics Department, Institute for Energy Technology, Kjeller (Norway)
  7. Department of Engineering Sciences, Uppsala University, Uppsala (Sweden)
Publication Date:
OSTI Identifier:
22443503
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 221; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ANNEALING; ANTIFERROMAGNETISM; CRYSTALLOGRAPHY; IRON PHOSPHIDES; LATTICE PARAMETERS; MAGNETIC MOMENTS; MAGNETIZATION; NEUTRON DIFFRACTION; TEMPERATURE RANGE 0065-0273 K; X-RAY DIFFRACTION