Magnetic and Transport Properties of Novel Magnetoelectric Nanocomposites

Abstract

In this study, the physical, magnetic and electrical transport properties of nanoferrites, nanoferroelectric and nanocomposites samples are investigated. The samples are classified into three groups as the following: 1) CFO group consists of CoFe2O4 (CFO), PbZr0.52Ti0.48O3 (PZT), 40%CFO+60%PZT composite and 40%CFO+60%PZT (0-3) core shell (C.S.). 2) CNFO group consists of Co0.1Ni0.9Fe2O4 (CNFO), PbZr0.52Ti0.48O3 (PZT), 40%CNFO+60%PZT composite and 40%CNFO+60%PZT (0-3) core shell (C.S.). 3) NFO group consists of NiFe2O4 (NFO), PbZr0.52Ti0.48O3 (PZT), 40%NFO+60%PZT composite and 40%NFO+60%PZT (0-3) core shell (C.S.). Ferrites, PZT, composites and C.S. were successfully prepared using sol-gel and hydrothermal methods. XRD diffraction patterns showed that ferrites and PZT had spinel and tetragonal structures respectively. Moreover, XRD showed double phases of ferrite and PZT for composite and C.S. samples. The lattice parameters of the same group showed insignificant change. The lattice parameters (a) and (c) of the constituent PZT in composite and C.S. were lower than the values of its pure form while the tetragonality degree (c/a) showed nearly constant values. The crystallite size of composite and C.S. were larger than their pure forms, ferrite and PZT. Nevertheless, the increase of the crystallite size of ferrites in composite was larger than in C.S. due to the shielding of PZT particles. The values of the microstrain% of