Search

We report the structural and magneto-dielectric properties of 0.95 Pb(Fe0.5Nb0.5)-0.05 Co0.6 Zn0.4Fe1.7Mn0.3O4 (0.95PFN-0.05CZFMO, PC5) particulate composite prepared using a hybrid synthesis technique. Rietveld refinement on the XRD patterns of the end compounds i.e. PFN and CZFMO were performed using monoclinic crystal structure with space group Cm and cubic crystal structure with space group Fd-3m respectively. The dual phase space group Cm+Fd-3m was taken to refine the XRD pattern of PC5 sample which confirms the formation of composite. The changes in the dielectric parameters by the application of magnetic field suggest existence of magneto-electric coupling behavior in the composite at room temperature (RT). The quantitative changes of the magneto-dielectric properties i.e. MC% (magneto- capacitance), ML% (magneto-loss), MI% (magneto-impedance) and MP% (magneto-phase) were calculated and discussed their dependence with magnetic fields at RT. [ABSTRACT FROM AUTHOR]

We report the structural, magnetic and dielectric properties of lightly Gd-substituted DyMnO3 (Dy0.95Gd0.05MnO3) prepared by acrylamide polymer gel template method. Rietveld refinement on powder X-ray diffraction (XRD) data were carried out using orthorhombic crystal structure with Pnmaspace group, which suggest the formation of single phase material. The temperature dependence magnetic susceptibility data indicates the existence of antiferromagnetic transition due to rare-earth ion and lock-in transition temperature. The magnetic properties study reveal the signature of antiferromagnetic behavior along with the existence of weak ferromagnetic component in low temperature region. The intrinsic dielectric behavior of the material was observed up to 160 K and above 160 K there is large increase in dielectric behavior, which may be due to contribution from extrinsic Maxwell-Wagner polarization phenomena. [ABSTRACT FROM AUTHOR]