Ferromagnetic materials

Details Ferromagnetic materials Ferromagnetic materials

H - Electricity

01

F

75/150

H01F 1/00 (2006.01) H01F 1/40 (2006.01)

Patent

CA 1337922

This invention provides a ferromagnetic alloy M3Ga2-xAsx where 0.15 x 0.99 and M represents iron or a component of the alloy where iron is substituted by manganese or cobalt. In the composition range 0.85 x 0.99 the lattice structure is hexagonal B82-type. In the composition range 0.15 x 0.75 the lattice structure is changed such that a2 = 2a1 and c2 = c1 (where a1 and c1 are the a and c spacings of the B82 structure and a2 and c2 are the a and c spacings of the new structure). The transition between the two lattice structures occurs within the composition range 0.75 x 0.85. As x decreases (i.e. as gallium is substituted for arsenic) in the range 0.15 x 0.99 the Curie Temperature, Tc, of the alloy is shown to generally increase.

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