Electron Paramagnetic Resonance Spectrum of Pr4+ in BaCeO3

✍ Scribed by Yukio Hinatsu; Norman Edelstein

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 243 KB
• Volume: 112
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1263

✦ Synopsis

The electron paramagnetic resonance spectrum of a powder of (\mathrm{Pr}^{4+}) in (\mathrm{BaCeO}{3}) was measured at (8.5 \mathrm{~K}). A very large hyperfine interaction with the ({ }^{141} \mathrm{Pr}) nucleus was observed. In addition to the allowed hyperfine transitions, forbidden hyperfine transitions were observed. The results were analyzed based on the weak field approximation, i.e., Breit-Rabi formula, and the (g) value, (|g|=) (0.745(1)) and the hyperfine coupling constant, (|A|=0.0606(2)) (\mathrm{cm}^{-1}), were obtained. From the measured (g) value, the (\Gamma{7} \rightarrow \Gamma_{8}) crystal field transition for (\mathrm{BaPrO}{3}) obtained from an earlier inelastic neutron scattering experiment, and setting the spin-orbit coupling constant to its free ion value (\zeta=865 \mathrm{~cm}^{-1}), the energy levels of (\mathrm{Pr}^{4+}) in (\mathrm{BaCeO}{3}) were calculated. The measured magnetic susceptibility of (\mathrm{BaPrO}_{3}) was compared to the values calculated with the above model. 1994 Acadernic Press, Inc.