Filter with ferroelectric-ferromagnetic composite materials

An electrical device with a filter comprising:

• an electrical lead and a composite ferroelectric-ferromagnetic material surrounding a portion of the electrical lead, and wherein said composite consisting essentially of two phases;
• said composite comprising grains of both ferroelectric and ferromagnetic material with chemical reaction between the ferroelectric and ferromagnetic material being substantially absent so that said ferroelectric and ferromagnetic materials constitute said two phases, said ferroelectric material and ferromagnetic material each being present in about 30 to 70 volume percent of the composite, said composite having a closed porosity ranging from 0 to 3 volume percent of the composite, and wherein said ferroelectric material comprises barium titanate and said ferromagnetic material is Cu.sub.0.2 Mg.sub.0.4 Zn.sub.0.5 Fe.sub.2 O.sub.4.

An electrical device with a filter comprising:

• an electrical lead and a composite ferroelectric-ferromagnetic material surrounding a portion of the electrical lead, and wherein said composite consisting essentially of two phases;
• said composite comprising grains of both ferroelectric and ferromagnetic material with chemical reaction between the ferroelectric and ferromagnetic material being substantially absent so that the ferroelectric and ferromagnetic materials constitute said two phases, said ferroelectric material and ferromagnetic material each being present in about 30 to 70 volume percent of the composite, said composite having a closed porosity ranging from 0 to 3 volume percent of the composite, and wherein said ferroelectric material is barium titanate present in 62.5 percent volume of the composite and said ferromagnetic material is CuO.sub.0.2 Mg.sub.0.4 Zn.sub.0.5 Fe.sub.2 O.sub.4 present in 37.5 percent by volume of the composite.

An electrical device with a filter comprising:

• an electrical lead and a composite ferroelectric-ferromagnetic material surrounding a portion of the electrical lead, and wherein said composite consisting essentially of two phases;
• said composite comprising grains of both ferroelectric and ferromagnetic material with chemical reaction between the ferroelectric and ferromagnetic material being substantially absent so that said ferroelectric and ferromagnetic materials constitute said two phases, said ferroelectric material and ferromagnetic material each being present in about 30 to 70 volume percent of the composite, said composite having a closed porosity ranging from 0 to 3 volume percent of the composite, and wherein said ferromagnetic material comprises a copper-zinc- magnesium-based ferrite.