Magnetic Rare Earth Compounds
Semiannual technical rept. 14 Jun-14 Dec 1971
HEWLETT-PACKARD CO PALO ALTO CA
Pagination or Media Count:
Magnetically uniaxial rare earth garnets, such as EuEr2Ga0.7Fe4. 3O12 and Y1.3GdYb0.7Fe4.1Ga0.9O12, have been grown by quasi steady-state isothermal liquid phase epitaxial techniques. The epitaxial layers have been grown on Syton polished 111 Gd3Ga5O12 substrates by the dipping technique in which the substrates, fastened to a platinum holder, are dipped into the supersaturated growth solution. Both PbO-B2O3 and BaO-B2O3-BaF2 solvents have been employed for the crystal growth, since each has certain distinct advantages and disadvantages for this type of growth situation. The BaO-based solvent has been characterized, and a solubility curve for a typical garnet, EuEr2Ga0.7 Fe4.3O12, has been experimentally determined. The magnetic films have been characterized with respect to solvent content and distribution coefficients of the constituent ions for each of the growth solutions, lattice parameter mismatch between epitaxial layer and substrate, and magnetic properties.
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