Synthesis and characterization of manganese ferrite from low grade manganese ore through solid state reaction route

Manganese ferrite spinel has been synthesized by using low grade manganese ore and ferric oxide as sources of manganese oxide and iron oxide through solid state reaction route by taking manganese and iron mole ratio of 1:2 respectively. The impact of sintering temperature on phase composition and particle size is investigated. Similarly, the impact of frequency on dielectric constant, dielectric loss, AC (alternating current) conductivity and tangent losses is also investigated. The results shows the presence of spinel structure manganese ferrite (MnFe2O4) as the major phase for the sample sintered at 1200 °C. It has been established that the crystallite size increase with rise in sintering temperature. The surface morphology of the sample sintered at 1200 °C show pyramidal and triangular shape grains. The dielectric constant (εʹ) and dielectric losses (εʹʹ) were observed to decrease with increasing the sintering temperature and frequency. Furthermore, the AC (alternating current) conductivity was found to rise with rise in applied frequency. On the other hand, the tangent losses falls considerably with rise in applied frequency.

Evidence of Finite Magneto-electric Coupling in SmFeO3 – PbTiO3 Solid Solutions

Present work investigates the detailed multiferroic properties of Pb1 − xSmxTi1−xFexO3, (x = 0.21, 0.22, 0.23, 0.24 and 0.25) synthesize through solid state reaction route. The structural, dielectric, ferroelectric and magnetic properties were measured. A sincere study is carried out to detect the magneto-electric coupling in all the samples through magneto-dielectric, magnetization after electric poling and magneto-pe response. The maximum value of coupling coefficient (γ) and magneto-dielectric response (MDR) of sample x = 0.24 has shown by magneto-dielectric properties and magnetization after electric poling whereas magneto-pe has shown that all the samples possess multiferroic nature.

Structural, morphological, dielectric and optical properties of double perovskites RBaFeTiO6 (R = La, Eu)

Double perovskites RBaFeTiO6 (R = La, Eu) were successfully synthesized using a solid state reaction route.

ON THE ENERGY TRANSFER IN LiMgPO4 DOPED WITH RARE-EARTH ELEMENTS

The phosphates LiMgPO4: RE (RE - Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm) with olivine-type orthorhombic structure were synthesized by the conventional solid state reaction route and their optical...