Intra-rare earth alloys

Gschneidner Jr., K.A., and Calderwood, EW. (1986) Intra-rare earth binary alloys phase relationships, lattice parameters and systematics. In Handbook on the Physics and Chemistry of Rare Earths, eds. Gschneidner Jr., K.A. and Eyring, L. (North-Holland, Amsterdam), Vol. 8, p. 1. 

K.A. Gschneidner Jr and F.W. Calderwood, Intra rare earth binary alloys phase relationships, lattice parameters and systematics 1... 

Discovery of the unique beautifiilly complex magnetic structures of the heavy lanthanide metals Discovery of the existence of the Sm(6)-phase in intra rare earth binary alloys... 

Fig. 14. Solution formation by the triva-lent rare earth metals. Extensive solid solutions means that 5 at.% or more of R in M or M in R is found in most of the R-M (or R-R ) systems when M (or R ) is shaded, where R is a second rare earth element in an intra rare earth binary alloy system. For M = Ga there is some evidenee that gallium dissolves extensively in the high-temperature bee form of the rare earth metals.

The major advantage of the recrystallization method is that alloys can be prepared of the desired composition by arc melting or some other suitable method of melting and then heat treated without changing composition. This is even true of metals with wide differences in vapor pressure. Alloys with a volatile component can be heat treated under pressure or in a sealed refractory metal crucible. McEwen and Touborg (1973) used an overpressure of 4 atmospheres while arc melting Tm alloys to prevent excessive vaporization of Tm. The alloys were then sealed in Ta to prevent loss during heat treatment. They also produced crystals of Y, Sm, Gd, Tb, Dy, Ho, Er, Tm, and many other intra-rare earth alloys. 

High pressure studies on magnetic transitions in rare earth metals, intra-rare earth alloys and compounds (the monochalcogenides, ferrites, spinels (RFe204) and garnets (R3Fe50i2 where R is a rare earth element)) have been numerous and all the work prior 1969 has been reviewed by Bloch and Pavlovic (1969). For the discussion on pressure studies of magnetic transition in this chapter, much material has been drawn from the above review. 

Solid state recrystallisation methods are particularly applicable to the elements and intra-rare earth alloys while melt growth techniques have found application for certain of the elements, but most particularly for intermetallic compounds use of the vapour-solid approach has been limited to the higher vapour pressure... 

---