8348. Samarium Cobalt

Nomenclature

CAS number: 12017-68-4
Cobalt compd with samarium (5:1); samarium pentacobalt.
Co5Sm; mol wt 445.03.
Co 66.21%, Sm 33.79%.
SmCo5.

Description and 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. Metallkd. 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. Magn. 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. Dentofacial 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.

Derivative

Samarium Cobalt (Sm2Co17).

Nomenclature

CAS number: 12052-78-7
Cobalt compd with samarium (17:2).
Co17Sm2; mol wt 1302.58.
Co 76.91%, Sm 23.09%.
Sm2Co17.

Description and 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. Magn. Mater. 101, 401 (1991). Orthodontic tooth movement study in animals: M. A. Darendeliler et al., Am. J. Orthod. Dentofacial Orthop. 107, 578 (1995).

Use

In permanent magnetic materials including: computer disk drives, sensors, traveling wave tubes, actuators, satellite systems, motors; in dental applications.