Rare-Earth-Iron Exchange Interactions in Europium Iron Garnet
- 10 January 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 153 (2), 409-415
- https://doi.org/10.1103/physrev.153.409
Abstract
Recoilless absorption measurements of the 14.4-keV rays of and the 21.6-keV rays of in europium iron-gallium garnets () were carried out at 4.2°K for . The iron concentrations in the octahedral and tetrahedral sites were determined from the spectra. The results show that about 80% of the Ga ions occupy tetrahedral sites (∼85% for and ∼75% for ). The analysis of the spectra shows that (88±4)% of the exchange field acting on an ion in europium iron garnet is produced by the two nearest iron neighbors in the tetrahedral site, although the Eu-O-Fe angle for these ions is 92°, an angle often considered unfavorable for superexchange interactions. Excellent agreement between theoretical and experimental spectra is obtained assuming that the remaining 12% of the exchange field is produced by the 4 third nearest neighbors in the tetrahedral site.
Keywords
This publication has 18 references indexed in Scilit:
- Determination of - and - Exchange Interactions from Electron Paramagnetic Resonance Shifts in Europium Gallium GarnetPhysical Review B, 1966
- Anisotropy of exchange in ytterbium iron garnetPhysics Letters, 1965
- Angular Momentum Compensation in Narrow Linewidth FerrimagnetsJournal of Applied Physics, 1965
- Magnetic and Crystallographic Studies of Substituted Gadolinium Iron GarnetsJournal of Applied Physics, 1965
- Angular momentum compensation in narrow line width ferrimagnetsPhysics Letters, 1964
- Effective Magnetic Field and Gradient of Electric Field Acting on the Nucleus of Eu in Europium Iron GarnetPhysical Review B, 1963
- Magnetism of Europium GarnetPhysical Review B, 1960
- The interaction of magnetic ions in Gd3Mn2Ge2GaO12and related garnetsJournal of Physics and Chemistry of Solids, 1959
- The crystal structure and ferrimagnetism of yttrium-iron garnet, Y3Fe2(FeO4)3Journal of Physics and Chemistry of Solids, 1957
- L'interaction Entre les Atomes Magnétogènes dans un Cristal ParamagnétiquePhysica, 1934