8 results about "Barium ferrite" patented technology

Barium ferrite, abbreviated BaFe, BaM, is the chemical compound with the formula BaFe₁₂O₁₉. This and related ferrite materials are components in magnetic stripe cards and loudspeaker magnets. BaFe is described as Ba²⁺(Fe³⁺)₁₂(O²⁻)₁₉. The Fe³⁺ centers are ferromagnetically coupled. This area of technology is usually considered to be an application of the related fields of materials science and solid state chemistry.