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Magnetic structure and magnetodielectric effect of YFe0.5Cr 0.5O3
Published in
2013
Volume: 113
   
Issue: 21
Abstract
X-ray diffraction studies reveal Pnma space group for YFe 0.5Cr0.5O3. The Neel temperature for YFe 0.5Cr0.5O3 is found to be ∼275 K using temperature dependence of magnetization and neutron diffraction studies. The variation of magnetization with applied magnetic field shows a hysteresis loop at 20 K, which depicts a weak ferromagnetic behavior. Rietveld refinement of the neutron diffraction data divulge a canted antiferromagnetic structure (Γ4 = GzFyAx) for YFe 0.5Cr0.5O3. Dielectric measurement depicts a relaxor like transition (peak at ∼507 K for 10 kHz) for YFe 0.5Cr0.5O3. An anomaly in the magnetization curve around this transition temperature points the possibility of magnetodielectric effect in YFe0.5Cr0.5O3. Non-Debye type relaxation is observed with activation energy of 0.40 eV at low temperature and 1.01 eV at high temperature. At high temperatures, oxygen ion vacancies are found to contribute to the conduction process in addition to polaron hopping. © 2013 AIP Publishing LLC.
About the journal
JournalJournal of Applied Physics
ISSN00218979
Open AccessNo
Concepts (16)
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    Antiferromagnetic structures
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    Applied magnetic fields
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    Dielectric measurements
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    Ferromagnetic behaviors
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    Magneto-dielectric effects
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    NEUTRON DIFFRACTION DATA
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    NEUTRON DIFFRACTION STUDIES
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    X-ray diffraction studies
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    Activation energy
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    Electromagnets
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    Magnetic materials
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    NEEL TEMPERATURE
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    Neutron diffraction
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    Rietveld refinement
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    X ray diffraction
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    Magnetization