Jahn-Teller effect in low-spin Ni3+ in the LaAlO3 ceramic
- 1 August 2002
- journal article
- Published by Pleiades Publishing Ltd in Physics of the Solid State
- Vol. 44 (8), 1468-1470
- https://doi.org/10.1134/1.1501339
Abstract
This paper reports on an EPR study of LaAl1−xNixO3 solid solutions with x≤0.12 made in the 4.2-to 300-K temperature range. In the X range, the broadening of the single EPR line with geff=2.148 was observed at temperatures below ∼40 K. In the Q range, a slightly anisotropic EPR line with g ⊥ ′ =2.145±0.002 and g ‖ ′ =2.154±0.002 transforms to a rhombic-symmetry spectrum with g1=2.183±0.002, g2=2.143±0.002, and g3=2.118±0.002. It is shown that the observed low-temperature effects are due to the lowered symmetry of the complex under the combined action of the tetragonal Jahn-Teller distortions and of the trigonal component of the crystal field.Keywords
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