SMCO5-BASED COMPOUNDS DOPED WITH FE AND NI FOR HIGH-PERFORMANCE PERMANENT MAGNETS
In accordance with one aspect of the presently disclosed inventive concepts, a magnet includes a material having a chemical formula: SmFe 3 (Ni 1−x Co x ) 2 , where x is greater than 0 and x is less than 1.
1 . A magnet, comprising:
a material having a chemical formula: SmFe 3 (Ni 1−x Co x ) 2 , wherein x is greater than 0 and x is less than 1.
2 . A magnet as recited in claim 1 , wherein x is greater than 1−x.
3 . A magnet as recited in claim 1 , wherein x is less than 1−x.
4 . A magnet as recited in claim 1 , wherein x is about equal to 1−x.
5 . A magnet as recited in claim 1 , the material has a CuCa 5 -type crystal structure.
6 . A magnet as recited in claim 5 , wherein the Fe atoms are distributed in a plurality of transition metal 3g nonequivalent atomic sites.
7 . A magnet as recited in claim 5 , wherein the Ni atoms and the Co atoms are distributed in a plurality of transition metal 2c nonequivalent atomic sites.
8 . A magnet as recited in claim 1 , wherein the magnet is a permanent magnet.
9 . A magnet as recited in claim 1 , wherein a spin orientation of the Sm atom is antiparallel to a spin orientation of the Fe, Ni, and Co atoms.
10 . A magnet as recited in claim 1 , wherein a magnetocrystalline anisotropy energy of the material is about twice a magnetocrystalline anisotropy energy of Nd 2 Fe 14 B magnet.
11 . A magnet as recited in claim 1 , wherein a magnetocrystalline anisotropy energy of the material is greater than about 9 MJ/m 3 .
12 . A magnet as recited in claim 1 , wherein a Curie Temperature of the material is about equal to a Curie Temperature of SmCo 5 .
13 . A magnet as recited in claim 1 , wherein a Curie Temperature of the material is greater than about 1100 K.
14 . A magnet as recited in claim 1 , wherein a maximum energy product of the material is greater than about 361 kJ/m 3 .
15 . A magnet as recited in claim 1 , wherein the magnet comprises a reduced amount of Co than an amount of Co in SmCo 5 .
16 . A magnet as recited in claim 15 , wherein the reduced amount of Co is up to 80% less Co than the amount of Co in SmCo 5 .
17 . A magnet, comprising:
a material having a chemical formula: SmFe 3 (Ni 1−x Co x ) 2 , wherein x is greater than 0 and x is less than 1, wherein the material has a CuCa 5 -type crystal structure.
18 . A magnet as recited in claim 17 , wherein x is greater than 1−x.
19 . A magnet as recited in claim 17 , wherein x is about equal to 1−x.
20 . A magnet as recited in claim 17 , wherein the Fe atoms are distributed in a plurality of transition metal 3g nonequivalent atomic sites.
21 . A magnet as recited in claim 17 , wherein the Ni atoms and the Co atoms are distributed in a plurality of transition metal 2c nonequivalent atomic sites.