Electron paramagnetic resonance spectra of Pr{sup 4+} in BaCeO{sub 3}, BaZrO{sub 3}, BaSnO{sub 3}, and their solid solutions
Journal Article
·
· Journal of Solid State Chemistry
- Hokkaido Univ., Sapporo (Japan)
The electron paramagnetic resonance (EPR) spectra of powders with Pr{sup 4+} doped in BaCeO{sub 3}, BaZrO{sub 3}, BaSnO{sub 3}, and their solid solutions were measured at 4.2 K. A very large hyperfine interaction with the {sup 141}Pr nucleus was observed. The results were analyzed based n the weak field approximation, i.e., the Breit-Rabi formula, and the g values and hyperfine coupling constants A were obtained. The measured g values are much smaller than {vert_bar}-1.429{vert_bar}, which shows that the crystal field effect on the behavior of a 4{line_integral} electron is large. The value of {vert_bar}g{vert_bar} decreases from 0.741 (Pr{sup 4+}/BaCeO{sub 3}) to 0.583 (Pr{sup 4+}/BaSnO{sub 3}), and is caused by the increase of the crystal field due to the shrinking of the lattice. On the other hand, the hyperfine coupling constants are almost constant: A = 0.060(1) cm{sup {minus}1}.
- OSTI ID:
- 269890
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 2 Vol. 122; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
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