Physics NotePublished
Cr-Gd Exchange Coupling Constants in Cr Doped
J. S. Helman
1988
Publication details
- Authors
- J. S. Helman
- Type
- Physics Note
- Status
- Published
- Publication date
- 1988
- Description
- The splitting of the fluorescence spectrum of Cr as a function of an external magnetic field in the system <math>GdAl0_3\,\!</math> with diluted Cr impurities at A1 sites was indicative of a puzzling dependence of the Cr-Gd exchange coupling constant <math>J_1\,\!</math> on the magnetization. Here it is shown that this dependence is an artifact simulated by the existence of an appreciable exchange coupling <math>J_2\,\!</math> between Cr and its next nearest neighbor Gd ions. <math>J_2\,\!</math> has the opposite sign to <math>J_1\,\!</math> <math>(\simeq -2.05cm^{-1})</math> and it is roughly an order of magnitude smaller.
- Year
- 1988
- Number
- CBPF-NF-022/88
- Linked to a thesis
- No
- Linked to a grant
- No