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Title: Spin-phonon coupling in scandium doped gallium ferrite

We embarked on a study of Scandium (Sc) doped (onto Ga site) gallium ferrite (GaFeO{sub 3}) and found remarkable magnetic properties. In both doped as well as parent compounds, there were three types of Fe{sup 3+} ions (depending on the symmetry) with the structure conforming to space group Pna2{sub 1} (Sp. Grp. No. 33) below room temperature down to 5 K. We also found that all Fe{sup 3+} ions occupy octahedral sites, and carry high spin moment. For the higher Sc substituted sample (Ga{sub 1−x}Sc{sub x}FeO{sub 3}: x = 0.3), a canted magnetic ordered state is found. Spin-phonon coupling below Néel temperature was observed in doped compounds. Our results indicated that Sc doping in octahedral site modifies spin-phonon interactions of the parent compound. The spin-phonon coupling strength was estimated for the first time in these Sc substituted compounds.
Authors:
; ; ;  [1] ; ;  [2] ; ;  [3]
  1. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)
  2. Department of Physics, Indian Institute of Technology, Kharagpur 721302 (India)
  3. Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)
Publication Date:
OSTI Identifier:
22399341
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 12; 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; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COUPLING; DOPED MATERIALS; FERRITES; GALLIUM; GALLIUM COMPOUNDS; IRON IONS; MAGNETIC PROPERTIES; ORTHORHOMBIC LATTICES; PHONONS; SCANDIUM; SCANDIUM COMPOUNDS; SPIN; TEMPERATURE RANGE 0273-0400 K