Electrical properties and magnetoelectric effect measurement in (x)Ni_0.8Cu_0.2Fe₂O₄+ (1 −x)Ba_0.9Pb_0.1Ti_0.9Zr_0.1O₃composites

Abstract

Composites with compositions (x)Ni 0.8 Cu 0.2 Fe 2 O 4 + (1 − x) Ba 0.9 Pb 0.1 Ti 0.9 Zr 0.1 O 3 , in which x varies as 0, 0.15, 0.30, 0.45 and 1 mol%, were prepared by a standard ceramic technique. X-ray diffraction was used to carry out the structural analysis. The microstructural analysis was carried out by scanning electron microscopy. The variation in dc resistivity with temperature was studied in the temperature range 300-773 K. The variation of dc resistivity with temperature shows a semiconducting behavior. From ac conductivity measurements in the frequency range 100 Hz to 1 MHz it is concluded that the conduction in the present composites is due to a small polaron hopping. The variations in dielectric constant and loss tangent were also studied. The magnetoelectric effect (ME) (dE/dH) H was measured as a function of intensity of the dc magnetic field. The maximum value of ME conversion factor was observed to be 431 μV cm −1 Oe −1 for the 15%Ni 0.8 Cu 0.2 Fe 2 O 4 + 85%Ba 0.9 Pb 0.1 Ti 0.9 Zr 0.1 O 3 composite. The ME coefficient has been explained in terms of ferrite-ferroelectric content.

Characterization and property measurements of (y) Co0.9Cd0.1Fe2O4+(1−y) PZT ME composites

“…It shows the similar behavior as that of the dielectric constant with frequency. Similar results have been reported by various workers in case of other composites [11,16]. Fig.…”

Magnetoelectric effect and electrical properties in BTO+Ni0.93Co0.02Cu0.05Fe2O4 particulate composites

“…This break observed due to the transition of composites from ferroelectric to paraelectric state. The resistivity decreases with increase in Table 1 Data on structural and dielectric properties of (1 − y) BaTiO [2].…”

“…The magnetoelectric (ME) effect is defined as variation of dielectric polarization in the composites on application of magnetic field, or magnetization induced by an external electric field [1,2]. The ME materials are applicable in the transducers, actuators, magnetic sensors for dc and ac magnetic field measurements etc [3].…”

High Dielectric Permittivity and Maxwell–Wagner Polarization in Magnetic Ni0.5Cu0.3Zn0.2Fe2O4 Ceramics

“…High dielectric constants decrease the penetration depth of electromagnetic wave by increasing the skin effect. Thereby, the control of the dielectric behaviors as well as the magnetic properties at high frequencies attracts considerably attention in recent years [4][5][6][7].…”