Spin-phonon coupling in scandium doped gallium ferrite

Journal Article · Sat Mar 28 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4916602· OSTI ID:22399341

Mukadam, M. D.; Basu, S.; Paul, Barnita; Roy, Anushree ^[1]; Grover, Vinita; Tyagi, A. K. ^[2]

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1. Department of Physics, Indian Institute of Technology, Kharagpur 721302 (India)
2. Chemistry Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)

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.

• OSTI ID: 22399341
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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