Earth cobalt

T. Ojima and co-workers, / Appl Phjs. 16, 671 (1977) IEEE Trans. Mag. 13, 1317 (1977) K. J. Stmat, ed.. Proceedings 3rd International Workshop on Rare Earth-Cobalt Permanent Magnets, University of Dayton, Ohio, 1978, p. 406. 

K. J. Stmat, ia Proceedings 4th International Workshop on Rare Earth-Cobalt Permanent Magnets, Society Non-Traditional Technology, Tokyo, 1979, p. 8. 

K. Halbach 1980, (Design of permanent multipole magnets with oriented rare earth cobalt material), Nud. Instrum. Meth. 169, 1-10. 

Figure 4.27 Plots of the cobalt contribution to the inverse susceptibility of rare-earth cobaltates. The curve for LaCoOj is shown in the inset. (After Madhusudan et al, 1980.)...

Thermodynamics and Kinetics of Hydrogen Absorption in Rare Earth-Cobalt (R2C07 and RC03) and Rare Earth-Iron (RFes) Compounds... 

GOUDY ET al. Rare Earth-Cobalt and -Iron Compounds... 

Typical domain walls are smooth and extend over many interatomic distances. However, deviations from this continuum picture occur in very hard materials (narrow walls), at grain boundaries and in the case of geometrical constraints. Narrow-wall phenomena, which have been studied for example in rare-earth cobalt permanent magnets [189] and at grain boundaries [95, 96], involve individual atoms and atomic planes and lead to comparatively small corrections to the extrinsic behavior. 

Keywords rare-earth cobaltates rare-earth manganites electronic phase separation ... 

Electronic phase separation in rare-earth cobaltates... 

Electronic phase separation in rare-earth cobaltates of the type Lnj-jAj-CoOs has come to the fore in the last 2 years. La0 5Sr0 5Co03 and other members of this family were once considered to be itinerant electron ferromagnets... 

Kundu, A., Sarkar, R., Pahari, B., Ghoshray, A. Rao, C. N. R, 2007 A comparative study of the magnetic properties and phase separation behavior of the rare earth cobaltates, Liyl5Sro Co03 (Lre=rare earth), J. Solid State Chem. 180, 1318-1324. (doi 10.1016/j.jssc.2007,02.003)... 

C. The Rare Earth-Cobalt Compounds 1. TheRCo2 Series... 

Stmat KJ (1988) Rare earth-cobalt permanent magnets. In Wohlfarth EP, Buschow KHJ (Eds.) Eerromagnetic materials, vol 4. North-HoUand, Amsterdam, p 131... 

In ternary systems of rare earths, cobalt and boron, quite a number of different ternary compounds are formed having a crystal structure related to the well-known CaCu5-type observed for RCo5 compounds. The sequence of structures obtained from GdCo5 by an ordered substitution of B atoms in some of the Co sites is shown in fig. 7. 

Workshop on Rare Earth-Cobalt Permanent Magnets, eds X.-S. Pan, W.-W. Ho and C.-Z. Yu (China Academic Publishers, Beijing, China) p. 339. 

Fig. 2. The rare-earth elements now used in rare earth-cobalt permanent magnets, their effect on magnet properties (referenced to Sm alloy), and relative cost of the rare earth component.

Fig. 4. Summary of rare earth-cobalt intermetallic phases. (After Strnat 1972b). Notes (1) Where double bars are drawn, the upper bar indicates the crystal symmetry and existence range of a high-temperature modification the lower bar represents the structure reported to be stable at room temperature. (2) For the heavy rare earths, Tb and Dy through Tm, the phase with the CaCu5-type structure exists only as RCo5t r with a Co-excess which increases with increasing atomic number of R. The RCo5 phases are generally unstable at room temperature (see fig. 5), but can be retained metastably at room temperature by rapid cooling. (3) Additional 5-19 phases have been reported, but their existence - certainly as a stable room-temperature phase - is questionable.

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