Multiferroic PbFe12O19 ceramics

Abstract

PbFe 12 O 19 (PFO) powders in hexagonal structure have been synthesized by sol-gel process using lead acetate, glycerin and ferric acetylacetonate as the precursor.

Synthesis and multiferroic properties of M-type SrFe12O19 hexaferrite ceramics

“…The remnant polarisation is about 23 lC/cm 2 and the electric coercivity is about 210 kV/m. Similar values of the remnant and maximal polarisations are obtained for M-type hexagonal ferrites AFe 12 O 19 prepared by polymer precursor technology [14][15][16].…”

“…Small addition of Mg or Al also helps to increase the resistivity [8,13,19]. M-type hexaferrite ceramics prepared by polymer precursor technics also have an enhanced resistivity [14][15][16].…”

“…On the other hand, combined large ferroelectricity and strong ferrimagnetism have been observed in pure single-phase hexaferrite ceramics synthesized by a polymer precursor method [14][15][16]. The origin of dual ferroic properties in this case could be related with a geometrical structural transition occurring below the Curie temperature.…”

Crystal structure and magnetic properties of the BaFe12−Al O19 (x=0.1–1.2) solid solutions

“…Because the multiferroism at room temperature is an essential issue for the realization of multiferroic devices that exploit the coupling between ferroelectric and ferromagnetic orders at ambient conditions, BiFeO 3 [12] together with recently investigated LuFe 2 O 4 [13], Pb 2 Fe 2 O 5 [14] and PbFe 12 O 19 [15] is currently considered to be promising candidates for device applications. The perovskite BiFeO 3 [12] shows weak magnetism, which somehow limit its practical application.…”

“…Therefore, preparation of a material in which large ferroelectricity and strong ferromagnetism coexist would be a milestone for modern electrics and functionalized materials [16]. Since large ferroelectric polarization was found in PbFe 12 O 19 ceramics [15] with hexagonal structure, it opened a new direction for potential multiferroic candidate to the conventional ferromagnetic oxides, Contents lists available at ScienceDirect journal homepage: www.elsevier.com/locate/jmmm such as BaFe 12 O 19 , which holds similar perovskite-like lattice units in its hexagonal structure.…”