hexagonal lanthanum ferrite for a team investigating its use as a semiconductor material. On discovering that it was actually a magnetic material, and confirming its structure by X-ray crystallography, they passed it on to the magnetic research group. Barium hexaferrite has both high coercivity (170 kA/m) and low raw material costs. It was developed as a product by Philips Industries (Netherlands) and from 1952 was marketed under the trade name Ferroxdure. The low price and good performance led to a rapid increase in the use of permanent magnets. In the 1960s Philips developed strontium hexaferrite (SrO•6Fe2O3), with better properties than barium hexaferrite. Barium and strontium hexaferrite dominate the market due to their low costs. Other materials have been found with improved properties. BaO•2(FeO)•8(Fe2O3) came in 1980. and Ba2ZnFe18O23 came in 1991. See also Ferromagnetic material properties Cobalt Ferrite References External links International Magnetics Association What are the bumps at the end of computer cables? Sources MMPA 0100-00, Standard Specifications for Permanent Magnet Materials Meeldijk, Victor Electronic Components: Selection and Application Guidelines, 1997 Wiley Ott, Henry Noise Reduction Techniques in Electronic Systems 1988 Wiley Luecke, Gerald and others General Radiotelephone Operator License Plus Radar Endorsement 2004, Master Pub. Bartlett, Bruce and others Practical Recording Techniques 2005 Focal Press Schaller, George E. Ferrite Processing & Effects on Material Performance Ceramic materials Ferromagnetic materials Types of magnets Loudspeakers Ferrites