Observation of room temperature Raman, magnetic and ferroelectric response of (1 - x)NiCo_2O_4 - xBaTiO_3 nanocomposites system

摘要

The single phase NiCo_2O_4 and BaTiO_3 were synthesized via Coprecipitation and solgel auto-combustion route separately and polycrystalline novel Nanocomposites (1 - x)NiCo_2O_4 - xBaTiO_3 [x=0.1, 0.3, 0.5] were prepared by ultra-sonication respectively with a prospect to understand the correlation between room temperature magnetic and ferroelectric performance. The structural information, pure phase formation and surface morphology with elemental composition were confirmed by XRD, FTIR and FESEM analysis. Various Raman peaks (F_(2g), E_g, A_(1g)) were observed corresponding to NiCo_2O_4 and E(TO), E(LO+TO) and E(LO) are assigned to BaTiO_3 nanoparticles. The M-H hysterics loop exhibits the curtailment of saturation magnetization and coercive field of NiCo_2O_4 from 5.07 emu/gm. to 2.8 emu/gm. and 448 Oe to 61 Oe with the incorporation of 50% BaTiO_3. Furthermore, the P-E response enhances in NiCo_2O_4 with the evolution of BaTiO_3 percentages. Tuning the magnetic and ferroelectric properties is a huge demand of several technologies to integrate future magnetic and nanodevices.