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Spin states of Ni3+ ions in PrSrAl1?x Ni x O4 ceramics |
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| Authors: | T A Ivanova V E Petrashen Yu V Yablokov A I Akimov S A Lebedev |
| Institution: | 1. Kazan Physical-Technical Institute, Russian Academy of Sciences, Sibirsky trakt 10/7, 420029, Kazan, Russian Federation 2. Institute of Molecular Physics, Polish Academy of Sciences, Poznan, Poland 3. Institute of Solid State Physics and Semiconductors, National Academy of Sciences of Belorussia, Minsk, Belorussia |
| Abstract: | Solid solutions PrSrAl1−x Ni x O4 have been synthesized and studied by electron paramagnetic resonance (EPR). It is shown that atx≤0.2 the Ni3+ ions may be present both in the high- and low-spin states. Asx increases, the part of high-spin centers increases as well. Models of the paramagnetic centers accounting for micro-heterogeneous structure of these ceramics are proposed. The observed features of the temperature dependence of the EPR signals are explained by the interaction of the nickel ions with fast-relaxing Pr3+ ions. |
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