Rare-earth iron garnets

Among the most interesting studies of thermal properties of rare-earth iron garnets are the heat capacity measurements at low temperature of Meyer and Harris (65, 139), Their data cover only the range 1.4°-20 °K. Below 5°K. the heat capacity of 4 trium iron garnet can be represented by the sum of the lattice term proportional to and by the spin-wave contribution of 2.15 X //(mole °K.). This last term is in... 

The magnetic field at Eu + ions measured by the 103-keV resonance in rare-earth garnets doped with 2-5% Sm (M3FesOi2, M = Gd, Tb, Dy, Ho, Er, Eu, Tm, Yb, Lu, Y) increases by only 8% in that order [68]. Identical fields in YIG and LuIG in which the rare earth is diamagnetic show that the rare-earth-iron exchange interaction is insensitive to the lattice parameters which differ by 1%. However, in the series as a whole, the Eu - -/rare-earth exchange interaction does alter and the field shows a linear dependence with the spin moment of the host, = (gj — ). As already seen for the... 

Espinosa, G. P. (1962). Crystal chemical study of the rare earth iron garnets. Journal of Chemical Physics, 37, 2344-7. 

Gyorgy, E. M., Sturge, M. D., Van Uitert, L. G., Heilner, E. J. Grodkiewicz, W. H. (1973). Growth-induced anisotropy of some mixed rare-earth iron garnets. Journal of Applied Physics, 44, 438-43. 

Inoue, M., Nishikawa, T., Inui, T. Glycothermal synthesis of rare earth iron garnets. J. Mater. Res. 13, 856-860 (1998)... 

Fig. 9.15. Change in the ferrimagnetic ordering temperature d with pressure for some rare earth iron garnets (from Bocquillon et al., 1973a).

Sankaranarayanan VK, Gajbhiye NS (1990) Low-temperamre preparation of ultrafine rare-earth iron garnets. J Amer Ceram Soc 73 1301-1307... 

Af (D = saturation magnetization of the rare earth iron garnet... 

Molecular field coefficients for rare earth iron garnets (Brandle and Blank, 1976). 

Yttrium alloys have many applications. The metal doped with rare earths such as europium is used as phosphor for color television receivers. When added to iron, chromium, vanadium, niobium, and other metals it enhances resistance of these metals and their alloys to high temperature oxidation and recrystallization. It is a deoxidizer for vanadium and other nonferrous metals. Yttrium-aluminum garnets are used in lasers and in jewelery gemstones. Yttrium-iron garnets are used as transmitters and as transducers of acoustic energy. 

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