Magnetoelectric effect in ferro(ferri)magnetic - ferroelectric structures

摘要

Magnetoelectric effect in bulk and multilayer structures consisting of ferro(ferri)magnetic and ferroelectric layers was investigated. This paper describes the synthesis and tape casting process for ferrimagnetic ferrites (Ni_(0.3)Zn_(0.62)Cu_(0.08)Fe_2O_4, CoFe_2O_4), ferrimagnetic intermetallics (TbFe_2) and ferroelectric relaxors (Pb(Fe_(1/2)Ta_(1/2))O_3, Pb(Fe_(1/2)Nb_(1/2))O_3). X-ray analysis and studies of the electrical and magnetic properties were performed for bulk and layered composites. Complex impedance and dielectric permittivity of bulk and layered composites were studied in a temperature range from -40 to 300°C and frequency range 10 Hz-2 MHz. Magnetic hysteresis was measured by a vibrating sample magnetometer (VSM) in an applied magnetic field up to 10 kOe at -269°C. The magnetic hysteresis determined for composites were typical of magnetic materials. Magnetoelectric effect at room temperature was investigated as a function of static magnetic field (300-7200 Oe) and frequency (10 Hz-10 kHz) of sinusoidal modulation magnetic field (7-18 Oe).