Electrical conduction and magnetoelectric effect in ferroelectric rich (x)Ni0.9Zn0.1Fe2O4+(1−x)PZT ME composites

• Published in: Journal of alloys and compounds Vol. 452; no. 2; pp. 205 - 209
• Main Authors: Chougule, S.S., Patil, D.R., Chougule, B.K.
• Format: Journal Article
• Language: English
• Published: 20.03.2008
• ISSN: 0925-8388
• DOI: 10.1016/j.jallcom.2006.11.020

Magnetoelectric composites with ferrite-ferroelectric compositions (x)Ni0.9Zn0.1Fe2O4+(1-x)PZT in which x varies as ,0.1,0.3,0.45 and 1mol% were prepared by using a conventional ceramic double-sintering method. The phase analysis was carried out using X-ray diffraction technique, which confirms that there is no any intermediate phases present in the composites. The variation of dielectric constant and loss tangent (tandelta) in the frequency range 20Hz to 1MHz was studied. The conduction phenomenon was explained on the basis of a small polaron hopping model. The confirmation of this phenomenon was made with the help of ac conductivity measurements. The dc resistivity was measured as a function of temperature in the temperature range from 300 to 800 deg C. Static magnetoelectric conversion factor (dE/dH)H was measured as a function of magnetic field. All composites show linear decrease of magnetoelectric conversion in the presence of static magnetic field.