Multiferroic composites in nano–microscale with non-solid solution by Co-ferrite and (K0.5Na0.5)NbO3-based ferroelectric matrix

Percolative dielectric behavior of wet chemical synthesized lead lanthanum titanate–cobalt iron oxide composite thin films

“…For solution derived CFO thin film, the dielectric constant is reported to be ∼ 25 [18]. Usually a monotonic decrease of the dielectric constant of such composite film or bulk composite is reported with the increase in CFO volume contents [9,19]. In contrast to these reports, as shown in Fig.…”

Magnetoelectric coupling in sol-gel synthesized dilute magnetostrictive-piezoelectric composite thin films

“…This is in contrary to many literatures reports where a monotonic decrease of the dielectric constant of such composite film or bulk composite is reported with the increase in CFO volume contents. 13,14 The dc conductivity of the composite films is found to increase monotonically with the increase in CFO volume contents. According to a general percolation theory developed for ceramic-metal composite, 15 the dielectric constant of a composite is strongly dependent on the conductivity ratio of the matrix and dispersed phase.…”

Impedance spectroscopy and conductivity mechanism of CoFe2O4–Pb(Zr0.53Ti0.47)O3 composite thick films

“…Multiferroic composites have drawn intensive interests in the past years due to the coexistence of ferroelectric and ferromagnetic ordering as well as the magnetoelectric coupling (ME) effect induced by both constituted phases [1][2][3][4]. Not only does the ME effect in these materials promise them a candidate for ME devices application [5], but these multiferroic materials could also be potentially used in devices which demand either ferroelectric or ferromagnetic properties, such as sensors, actuators and other devices which take advantage of ferroelectric and ferromagnetic properties simultaneously without their coupling properties [6][7][8].…”