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Title: Disorder-driven spin-reorientation in multiferroic h-YMn{sub 1−x}Fe{sub x}O{sub 3}

Magnetic structure evolution of multiferroic hexagonal YMn{sub 1−x}Fe{sub x}O{sub 3} (x = 0, 0.05, and 0.1) has been studied by carrying out detailed temperature-dependent neutron diffraction at zero and 5 T fields. Thermodynamic data confirm antiferromagnetic ordering at T{sub N} in all the compositions. Our sub-T{sub N} neutron diffraction results assign the magnetic structure of pure YMnO{sub 3} to Γ{sub 1} irreducible representation. Over the perturbative-doping range, magnetic structure changes via Γ{sub 1} + Γ{sub 2} for YMn{sub 0.95}Fe{sub 0.05}O{sub 3} on to Γ{sub 2} for YMn{sub 0.9}Fe{sub 0.1}O{sub 3}, as the maiden compositional analogue of spin-reorientation; its occurrence in temperature-domain already reported for several manganites. Moreover, while the large thermal isostructural changes observed above T{sub N} are subdued in the ordered state, small alterations by the applied 5 T-field are relatively uniform across, confirming strong magneto-elastic nature of the system. Decrease of the ordered magnetic moment (μ{sub ord}) and planar magnetic frustration noted with Fe-doping is enhanced by the applied field, apparently through canting.
Authors:
; ;  [1] ; ;  [2]
  1. UGC-DAE-Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452 001 (India)
  2. UGC-DAE-Consortium for Scientific Research, Mumbai Centre, R5 Shed, Bhabha Atomic Research Centre, Mumbai 400 085 (India)
Publication Date:
OSTI Identifier:
22308735
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 2; 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; ANTIFERROMAGNETISM; IRON COMPOUNDS; IRREDUCIBLE REPRESENTATIONS; MAGNETIC MOMENTS; MAGNETIC PROPERTIES; MANGANESE COMPOUNDS; NEEL TEMPERATURE; NEUTRON DIFFRACTION; OXYGEN COMPOUNDS; PERTURBATION THEORY; SPIN ORIENTATION; TEMPERATURE DEPENDENCE; THERMODYNAMIC PROPERTIES; YTTRIUM COMPOUNDS