SmCo Magnets
As part of the rare earth group of permanent magnets, samarium cobalt (SmCo) magnets typically fall into two families of materials. They include rare earth Sm1Co5 and Sm2Co17 and are referred to as 1:5 and 2:17 materials. Samarium cobalt typically offers high energy products with excellent coercive (resistance to demag) forces. This makes samarium an excellent choice for small, compact designs where high temperature environments may be present.
Magnetic Properties of SmCo
Model
Br
Hcj
Hcb
(BH)max
mT
KGs
KA/m3
KOe
KA/m3
KOe
KJ/m3
MGOe
OM16
750-880
7.5-8.8
>1989
>25
597+/-40
7.5+/-0.5
127+/-16
16+/-2
OM18
800-930
8.0-9.3
>1432
>18
637+/-40
8+/-0.5
143+/-16
18+/-2
OM20
850-980
8.5-9.8
>1273
>16
637+/-40
8+/-0.5
159+/-16
20+/-2
OMT18
900-1030
9.0-10.3
>1194
>15
637+/-40
8+/-0.5
143+/-16
18+/-2
OM22A
900-1030
9.0-10.3
>1989
>25
653+/-40
8.2+/-0.5
175+/-16
22+/-2
OM22B
900-1030
9.0-10.3
>1432
>18
635+/-40
8.2+/-0.5
175+/-16
22+/-2
OM24
980-1080
9.8-10.8
>1432
>18
676+/-40
8.5+/-0.5
191+/-16
24+/-2
OM26A
1000-1130
10.0-11.3
>1194
>15
716+/-40
9.0+/-0.5
207+/-16
26+/-2
OM26B
1000-1130
10.0-11.3
>796
>10
716+/-40
9.0+/-0.5
207+/-16
26+/-2
OM28
1030-1130
10.3-11.3
>1432
>18
756+/-40
9.5+/-0.5
223+/-16
28+/-2
OM27
1000-1100
10.0-11.0
413-556
5.2-7.0
357-516
4.5-6.5
183-223
26+/-2
OM30
1100-1200
11.0-12.0
454-597
5.7-7.5
438-517
5.5-6.5
239+/-16
30+/-2
