THE GOLDANSKII-KARYAGIN EFFECT IN Gd2M2O7 AND Eu2M2O7 COMPOUNDS
- 1 December 1976
- journal article
- Published by EDP Sciences in Le Journal de Physique Colloques
- Vol. 37 (C6) , C6-49
- https://doi.org/10.1051/jphyscol:1976611
Abstract
A large Goldanskii-Karayagin (G. K.) effect has been observed in the recoilless absorption measurements of the 103 eV γ ray of 153Eu in a single crystal of Eu2Ti2O7. The size of the effect is consistent with results obtained previously in a Eu2Ti2O7 powder sample. G. K. effects were observed in the Mössbauer effect of the 105 keV γ ray transition of 155Gd in Gd2Ti2O7, Gd2Sn2O7, Gd2CrSbO7, Gd2SnTiO7, Gd2RuzO7 and Gd2Ir2O7. The quadrupole interaction parameters in these compounds change drastically and linearly with the size of the unit cell. The G. K. effect was also observed in the Mössbauer spectrum of the 123 keV γ ray of 154Gd in Gd2Ti2O7. The dependence of the G. K. effect on various parameters is discussedKeywords
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