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US 5,397,490 AGranted
Magnetic material
AssigneesTsuyoshi Masumoto, Akihisa Inoue, Yoshida Kogyo K.K.
InventorsTsuyoshi Masumoto, Akihisa Inoue, Junichi Nagahora
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AssigneesTsuyoshi Masumoto, Akihisa Inoue, Yoshida Kogyo K.K.
InventorsTsuyoshi Masumoto, Akihisa Inoue, Junichi Nagahora
Estimating the term…
A magnetic material consisting essentially of A1 and 10 to 50 at. % of at least one capable of alloying with A1 to form quasicrystals (for example, 5 to 25 at. % of at least one member selected between Cu and Pd and 5 to 35 at. % of Mn) and up to 25 at. % of at least one element having a smaller atomic radius than those of the above elements (for example, B). The magnetic material is produced by adding, to a mixture consisting of A1 and at least one element capable of alloying with A1 to form quasicrystals and including at least one transition metal, at least one element having a smaller atomic radius than those of A1 and the above elements to dissolve the element having a smaller atomic radius in a solid solution form in a quasicrystalline phase. The thus obtained magnetic crystal is useful in various applications, such as magnetic recording heads, and a process for producing the same.
A magnetic material consisting essentially of a quasicrystalline phase consisting of Al, 10 to 50 at. % of metal elements capable of alloying with Al to form quasicrystals, said metal elements consisting of 5 to 25 at. % of at least one noble metal element selected from the group consisting of Ni, Cu, Pd, Ag, Pt, and Au and 5 to 35 at. % of at least one transition metal element selected from the group consisting of V, Cr, Mn, Fe, Co, Nb, Mo, Tc, Ru, Rh, Ta, W, Re, Os, and Ir, and more than 0 to 25 at. % of at least one element selected from the group consisting of B and P and having a smaller atomic radius than those of Al and said metal elements, the element having a smaller atomic radius being present in an amount sufficient to effect a magnetic material having a higher magnetization than said magnetic material absent said element.
Dependencies are inferred from the claim text.