Density rare-earth magnet

During the early 1970s researchers at Bell Laboratories studied these salts, both hydrated and anhydrous, because of their interest in the electrical, magnetic, and structural properties of the compounds. Syntheses were also studied and the results were compared with previously published results.82 83 Densities of all the anhydrous rare-earth iodates, derived from crystallographic data,83a are listed in Table 9.20. Extensive crystallographic data of these salts are also provided, as is a comparison with previous work cited in our earlier publication.2... 

Self-consistent spin densities and their related magnetization and exchange fields were studied in the RNijBjC compounds with R=Pr, Nd, Sm, Gd, Ho, and Tm [111]. One of the main puzzles, the coexistence of SC and AF order for the heavy rare earth compounds, and the total absence of SC in the light-R compounds, can now be more or less quantitatively explained. Most simply, we can think of the interaction between the R 4f-moment and the (mostly Ni) conduction electrons which participate in SC pairs as a multi-link process ... 

Antipcrovskites are known to form with rare earth elements, most notably the series ATTAIN (Af = C c. La. Nd, Pr, Sm [227], Those with the actual perovskite structure are oxynitrides LaWO(, N, 4 and NdWOu N, 4 [22.8] and have been the subject of some theoretical discussion [2291. The magnetic phase transitions can be explained by assuming that the Fermi level lies near a singularity in the electronic density of states [230], XANF.S and heat capacity measurements confirm these magnetic transitions [231, 232]. 

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