Magnetoelectric PZT/ferrite composite material

Abstract

The PZT/ferrite composite materials of different types of connectivity were prepared and investigated. The firing of powder mixtures, hot pressing, alternative slicing of piezoelectric ceramic and ferrite and other techniques were used to produce the magnetoelectric composites. The most high values of the magnetoelectric coefficient AEIAH were found in sintered mixtures of PZT powders with ferrite and sliced materials with 35-55 wt% of ferrite. The magnetoelectric response sharply increased with increase of bias magnetic field up to 0.5-1.0 kOe. Meanwhile, the magnetoelectric composites showed a significant piezoelectric sensitivity and this property is to be taken into account when sensors are being designed.

Multiferroic properties of lead-free Ni0.5Zn0.5Fe1.9O4−δ−Na0.5Bi0.5TiO3 composites synthesized by spark plasma sintering

“…In relaxor materials, the Curie temperature is turned into a diffuse phase transition temperature and the dielectric constant shows frequency dispersion. It has been reported [31,32] that the broadening of peak is one of the most important characteristics of a disorder perovskite structure with diffuse phase transition in various ME composites. The transition broadening should be attributed to disordering in the arrangement of cations on one or more crystallographic sites in the structure, leading to a microscopic heterogeneity.…”

Low-temperature sintering and electromagnetic properties of ferroelectric–ferromagnetic composites

“…The ferroelectricferromagnetic composites, as two-phase multiferroic materials, are desired not only for the fundamental research of magnetoelectric effect, but also for the potential applications in many electronic devices, such as electromagnetic interference filters and the integration of chip inductors and capacitors [2][3][4]. The most widely studied systems correspond to Co or Ni ferrites, with PZT, PNNT, BaTiO 3 (BT), BiFeO 3 or BST, with combinations both of ferrites and piezoelectrics, and various magnetic-electric bulk composites have been prepared in the last few years [2,[5][6][7][8][9][10][11].…”

Electrical and magnetic properties of low-temperature sintered xBa0.6Sr0.4TiO3+(1−x)Ni0.2Cu0.2Zn0.62O(Fe2O3)0.98 composite ceramics

“…Recently, with the development of low-temperature co-fired ceramics (LTCC) technology and integrated chip elements, a new kind of ferromagnetic-dielectric and ferromagnetic-ferroelectric composite materials have been attracted a great deal of attentions from academics and industries because of their interesting electromagnetic properties [1][2][3][4][5][6][7][8][9][10][11][12], which can be used in many electronic devices, such as electromagnetic interference (EMI) filters and the integration of chip inductors and capacitors. The filters' performance can be tailored easily by adjusting the complex permittivity and permeability characteristics of ferromagnetic-electric composite materials through compositional variation.…”