A survey is given of the physical properties, composition and crystal structure of intermetallic compounds formed between rare-earth elements and 3d transition elements. Apart from binary compounds the results of pseudobinary series are also considered. The magnetic properties determined by the exchange interactions involving 4f as well as 3d electrons, are discussed together with experimental results available on magnetovolume effects and various resonance techniques such as NMR and the Mossbauer effect.

https://iopscience.iop.org/article/10.1088/0034-4885/40/10/002/pdf

Intermetallic compounds of rare-earth and 3d transition metals

Magnetism in rare earth—3d intermetallics☆

Publisher Summary This chapter discusses rare earth compounds. The number of stable binary intermetallic compounds in which one of the components is a rare earth element is of the order of a thousand. Combination with elements of much smaller metallic radii then encompasses a much larger number of possible atomic arrangements of sufficiently high space filling than would be the case for two components of almost equal size. A meaningful study of the physical properties of intermetallic compounds can only be made on single phase materials. Only a fraction of the compounds is in single phase condition after the melting together of the components. The chapter explains the compounds with non-magnetic elements and compounds with d-transition metals. It also explains ternary compounds or hydrides.

Chapter 4 Rare earth compounds

Onset of magnetism in concentrated ternary alloys II: Laves phase compounds A(Fe1-xBx)2 (A = Y, Zr, U; B = Mn, Co and Al)

Electronic densities of states in Y-Co (Y2Co17, YCo5, Y2Co7 and YCo3), Y-Fe (Y2Fe17, Y6Fe23 and YFe3) and Y6Mn23 intermetallic compounds are calculated in the tight-binding d-band model by making use of the recursion method. The average and local magnetic moments on Co and Fe atoms, the high-field susceptibility and the coefficient of the low-temperature specific heat are calculated and compared with the experimental values. The temperature dependences of the spin susceptibility and the spontaneous volume magnetostriction in Y-Fe compounds are also calculated and compared with the experimental results.

http://iopscience.iop.org/article/10.1088/0305-4608/15/7/010/pdf

Electronic structure and magnetic properties of Y-Co, Y-Fe and Y-Mn intermetallic compounds

Electronic specific heat and high field magnetization studies on the Y6(Fe1−xMnx)23 system

The effect of varying electron concentration on the magnetic ordering in the ternary intermetallic compounds DyCo3−xNix, DyFe3−xNix, HoCo3−xNix, HoFe3−xNix, with 0<x<3, has been investigated by saturation magnetization studies. The results show a filling of the Co and Fe bands and also a polarization of the 3d band of nickel. In the case of the Co compounds an additional contribution from the induced moment on cobalt by the rare‐earth exchange field is found to be important.

K.S.V.L. Narasimhan

Papers

Electronic specific heat and high field magnetization studies on the Y6(Fe1−xMnx)23 system

Magnetic properties of RT3−x′Nix compounds (R=Dy or Ho and T′=Fe or Co)

Magnetic properties of DyFe3−xCox and HoFe3−xCox

Magnetic properties of Gd1−xThxFe2 and Gd1−xCexFe2

Magnetic properties of Ln2−xLn′xCo17 compounds (Ln = Gd, Dy, Ho, or Er, Ln′ = Th or Ce)