Magnetic materials

Details Magnetic materials Magnetic materials

H - Electricity

01

F

31/133, 75/2, 14

H01F 1/047 (2006.01) H01F 1/053 (2006.01) H01F 1/055 (2006.01) H01F 1/057 (2006.01) H01F 1/058 (2006.01) H01F 1/059 (2006.01) H01F 7/02 (2006.01) H01F 41/02 (2006.01)

Patent

CA 2040686

ABSTRACT: IMPROVED MAGNETIC MATERIALS A new magnetic material of the general formula: RxFeyxlazb is derived from an intermetallic compound of rhombohedral, hexagonal or tetragonal crystal structure wherein R is one or more rare earth elements, X' is an element of groups IIIA, IIIB, IVA or IVB of the periodic table, Z is one or more elements of group VA of the periodic table, x is a value from 0.5 to 2, y is a value from 9 to 19, a is a value from 0 to 3, b is a value from 0.3 to 3 and wherein when the magnetic material of said general formula is derived from an intermetallic compound of rhombohedral or hexagonal crystal structure Fe is unsubstituted or partially substituted by another element and when the magnetic material of said general formula is derived from an intermetallic compound of tetragonal crystal structure Fe is partially substituted by any element of group IIIA or IVA of the periodic table or a transition metal from another group with the further proviso that in the case of materials derived from said rhombohedral or hexagonal crystal structures the element X' is not boron when the component Z is antimony or bismuth. In these new materials the element Z is an interstitial addition to the existing structures and is introduced by a gas-solid reaction. The materials exhibit increased Curie temperatures, magnetic strength and easy uniaxial anisotropy and are therefore suitable for fabricating into permanent magnets.

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