"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Magnetoelectric properties of multiferroic cobalt ferrite and soft piezoelectric PZT particulate composites

C. MICLEA1,* , C. TANASOIU1, L. AMARANDE1, C. F. MICLEA1, C. PLAVITU2, M. CIOANGHER1, L. TRUPINA1, C. T. MICLEA2, T. TANASOIU2, M. SUSU2, I. VOICU2, V. MALCZANEK3, A. IVANOV1, C. DAVID4

Affiliation

  1. National Institute for Materials Physics, Bucharest-Magurele, Romania
  2. Hyperion University, Calea Calarasilor 169, sector 3, Bucharest, Romania
  3. Fairleigh Dickinson University, NJ, USA
  4. Technical University of Civil Engineering of Bucuresti, Romania

Abstract

Multiferroic composite materials, consisting of piezoelectric and piezomagnetic phases, show electric polarization in the presence of a magnetic field and magnetization on applying an electric field, i.e. piezomagnetic phase causes polarization while piezoelectric phase causes changes in magnetization. The figure of merit of such multiferroic particulate composites is the magnetoelectric voltage coefficient representing the amount of polarization induced by a given magnetic field. In the present investigation we prepared and studied the properties of bulk particulate composites made from cobalt ferrite (COF) and a soft piezoelectric material (PZT). Composite samples, according to the formula xCOF·(1-x)PZT with 0 ≤ x ≤ 1 were prepared by mixing the COF and PZT powders, pressing them as discs and then sintered at 1200 o C for 3 hours. Structural, magnetic, piezoelectric and magnetoelectric characteristics of the sintered composites were determined as a function of the mass fraction of COF into PZT and magnetic field. The ME coefficient shows a maximum value of about 70 mV/cm⋅Oe for composites containing 40 % COF and 60% PZT, in a DC magnetic field of 3 kOe at a frequency of 1KHz of the ac magnetic field. Some of the dielectric and piezoelectric properties of the composite samples, as a function of the mass fraction x, were also determined..

Keywords

PZT, Multiferroic, Piezoelectric, Cobalt ferrite, Magnetoelectric.

Submitted at: Oct. 20, 2009
Accepted at: Feb. 18, 2010

Citation

C. MICLEA, C. TANASOIU, L. AMARANDE, C. F. MICLEA, C. PLAVITU, M. CIOANGHER, L. TRUPINA, C. T. MICLEA, T. TANASOIU, M. SUSU, I. VOICU, V. MALCZANEK, A. IVANOV, C. DAVID, Magnetoelectric properties of multiferroic cobalt ferrite and soft piezoelectric PZT particulate composites, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 2, pp. 272-276 (2010)