Studies of the g factors and the local structure for Ni3+ in LaAl0.9Ni0.1O3, La0.75Y0.25Al0.99Ni0.01O3 and YAl0.9Ni0.1O3 |
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| Authors: | Hua-Ming Zhang Guang-Duo Lu Zhi-Hong Zhang Li-Hua Wei |
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| Affiliation: | 1. Department of Applied Physics , University of Electronic Science &2. Technology of China , Chengdu, People's Republic of China |
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| Abstract: | The electron paramagnetic resonance g factors and the local structure for Ni3+ in LaAl0.9Ni0.1O3 (LAN), La0.75Y0.25Al0.99Ni0.01O3 (LYAN) and YAl0.9Ni0.1O3 (YAN) are theoretically studied from the perturbation formulas of the g factors for a 3d7 ion of low spin (S = 1/2) in tetragonally elongated octahedra. In these formulas, the contributions to the g factors from the tetragonal distortion, characterized by the tetragonal field parameters Ds and Dt are taken into account. According to the calculations, the ligand octahedra around Ni3+ are suggested to suffer 2% relative elongation along the [001] (or C4) axis due to the Jahn-Teller effect. |
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| Keywords: | defect structures electron paramagnetic resonance crystal-fields and spin Hamiltonians Ni3+ LaAlO3 LaYAlO3 YAlO3 |
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