Structural, electrical, magnetic and 57Fe Mössbauer study of polycrystalline multiferroic DyFeO3.

Structural, Raman spectroscopy, leakage current density, temperature dependent magnetization and Mössbauer measurements of polycrystalline DyFeO 3 (DFO) prepared through sol–gel route are reported in this paper. Phase purity and structure of the prepared sample is confirmed from x-ray diffraction and Raman spectroscopy measurements. The room temperature leakage current density ( J – E ) measurements indicate that Ohmic contribution and space charge limited conduction are the dominating mechanisms at low and high applied electric fields respectively. Signatures of Fe 3+ spin reorientation transition ( T SR ) and the antiferromagnetic ordering of Dy 3+ ions are observed from the temperature dependent (10–350 K) magnetization data. The M – H data measured at 2 K shows the field induced metamagnetic transition. Internal hyperfine field obtained from temperature dependent (5–300 K) 57 Fe Mössbauer measurements is observed to decrease below the T SR and further found to increase till 5 K indicating the contribution of Dy 3+ magnetic ordering on the hyperfine field of Fe nucleus. [ABSTRACT FROM AUTHOR]