Role of Mg and In substitution on magnetic, magnetostrictive and dielectric properties of NiFeO ceramics derived from nanopowders.

The effect of Mg2+ and In3+ substitution on the structural, magnetic, magnetostrictive and dielectric properties of NiFe2O4 samples derived through sintering of nanocrystalline ceramic powders is investigated. Namely, NiFe2O4, NiMg0.2Fe1.

Low temperature dielectric properties and NTCR behavior of the BaFeNbO double perovskite ceramic.

The double perovskite-structured barium iron niobate (BaFeNbO, BFN), a lead-free ferroelectric, shows a very high dielectric constant value. We report here the temperature dependent dielectric permittivity, impedance and electric modulus behavior of the BFN ceramic studied between 300 K and 20 K. The phase-pure BFN powder sample was synthesized using a conventional solid state reaction route.

Magnetic field dependent steady-state shear response of FeO micro-octahedron based magnetorheological fluids.

We report the synthesis of single crystalline octahedron-shaped magnetite microcrystals, the preparation of magnetorheological fluids (MRFs) and their magnetorheological properties under steady-state shear conditions. The magnetite microcrystals were synthesized via the template-free hydrothermal route. MRFs with three different particle concentrations (10, 20 and 40 weight%) were prepared and were subjected to steady shear conditions at various externally applied magnetic fields of strength up to 1.