Ferroelectrics · 1994 · 24 citations · 5 references
Natural SciencesMaterials SciencePhysicsCondensed Matter PhysicsElectromagnetismMagnetic MaterialsAntiferromagnetic MaterialsAntiferromagnetismDielectricsMagnetic OxidesMagnetic Properties Of SolidsAntiferromagnetic OxidesDielectric CharacterizationDielectric MeasurementDielectric RelaxationMagnetoelectric CouplingMagnetoelectric EffectPolycrystalline MaterialsStatic Magnetic Field
Abstract We report the magnetoelectric effect of a polycrystalline sample of a triangular Ising antiferromagnet ErFe2O4-δ, in which the existence of short range charge ordering was inferred from the neutron and dielectric studies. The sign of the magnetoelectric signal was reversed at 77 K, when the electric or magnetic field was applied in the opposite directions during cooling the specimen down to 77 K. The sign of the signal was independent of the direction of the static bias magnetic field in the range above 150 K. The signal was maximum at 183 K. We suggest a relation between the origin of the magnetoelectric effect and the dielectric relaxation due to an electron hopping between Fe3- and Fe2+ sites. Key Words: RFe2O4 ErFe2O4 magnetoelectric effectdielectric relaxationelectron hoppingcharge order
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Two-dimensional spin ordering in YFe2O4
Jun Akimitsu, Yasuhiro Inada, Kiiti Siratori et al. · Solid State Communications · 1979 · 72 citations