Abstract
We have investigated the structural and magnetic properties of Sr0.9La0.1TiO3 and Sr0.9La0.1Ti0.9Co0.1O3. Both samples can be indexed by a cubic lattice with the space group Pm3m at room temperature. The measurements of x-ray photoelectron spectroscopy and electron paramagnetic resonance confirmed the presence of Ti3+ ions in the samples. The sample Sr0.9La0.1TiO3 exhibits a strongly enhanced Pauli-paramagnetism behavior, whereas Sr0.9La0.1Ti0.9Co0.1O3 undergoes a ferrimagnetic transition at 127 K confirmed by a small λ anomaly at 128 K in the curve of specific heat. This transition may originate from a local charge transfer that creates some Co3+-Ti3+ antiferromagnetic pairings.
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