Samarium Cobalt
Structural Formula Vector Image
Title: Samarium Cobalt
CAS Registry Number: 12017-68-4
CAS Name: Cobalt compd with samarium (5:1)
Additional Names: samarium pentacobalt
Molecular Formula: Co5Sm
Molecular Weight: 445.03
Percent Composition: Co 66.21%, Sm 33.79%
Line Formula: SmCo5
Literature References: Prepd by sintering or mechanical alloying to yield a single phase, highly efficient permanent magnetic material. Prepn: K. J. Strnat, A. E. Ray, Z. Metallkunde 61, 461 (1970). Synthesis by mechanical alloying: J. Wecker et al., J. Appl. Phys. 69, 6058 (1991). Prepn and magnetic properties of nanoparticles: E. M. Kirkpatrick et al., IEEE Trans. Magnetics 32, 4502 (1996). Studies on use as a dental material: H. Tsutsui et al., J. Dent. Res. 58, 1597 (1979). Biocompatibility study: L. Bondemark et al., Am. J. Orthod. Dentofac. Orthop. 105, 568 (1994). Review of magnetic properties: R. A. McCurrie, Cobalt 1, 23-24, 28 (1973); of properties, production and applications: H. J. Marik, K. Schlenk, Powder Metallurgy Int. 9, 142-144 (1977).
Properties: mp ~1325°. Curie temp: 724° (Strnat); also reported as 680° (Tsutsui). d 8.60.
Melting point: mp ~1325°
Density: d 8.60
Derivative Type: Samarium Cobalt (Sm2Co17)
CAS Registry Number: 12052-78-7
CAS Name: Cobalt compd with samarium (17:2)
Molecular Formula: Co17Sm2
Molecular Weight: 1302.58
Percent Composition: Co 76.91%, Sm 23.09%
Line Formula: Sm2Co17
Literature References: Prepn and crystal structure: W. Ostertag, K. J. Strnat, Acta Crystallogr. 21, 560 (1966); and magnetic properties: K. Strnat et al., J. Appl. Phys. 37, 1252 (1966). 147Sm and 149Sm NMR study: H. Figiel et al., J. Magn. Magnet. Mater. 101, 401 (1991). Orthodontic tooth movement study in animals: M. A. Darendeliler et al., Am. J. Orthod. Dentofac. Orthop. 107, 578 (1995).
Use: In permanent magnetic materials including: computer disk drives, sensors, traveling wave tubes, actuators, satellite systems, motors; in dental applications.

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