Publication: Controlled oxygen vacancies and space correlation with Cr3+ in SrTiO3
Controlled oxygen vacancies and space correlation with Cr3+ in SrTiO3
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La Mattina, F., Bednorz, J. G., Alvarado, S. F., Shengelaya, A., Müller, K. A., & Keller, H. (2009). Controlled oxygen vacancies and space correlation with Cr3+ in SrTiO3. Physical Review. B, Condensed Matter and Materials Physics, 80(7), 075122. https://doi.org/10.1103/PhysRevB.80.075122
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By means of electron paramagnetic resonance (EPR) measurements on thermally reduced Cr-doped SrTiO3, we find a strong correlation between the Cr3+ ions and oxygen vacancies (Vos). A charge compensation associated with the creation of Vos induced by thermal reduction causes the valence of the Cr ions to change from 4+ to 3+. This induces a symmetry change in the crystal field experienced by the Cr atom from cubic to axial. On the other hand, in Cr/Nb-codoped samples, where Vos are absent, the Cr3+ EPR signal is isotropic, indicating th
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- La Mattina, F
- Bednorz, J G
- Alvarado, S F
- Shengelaya, A
- Müller, K A
- Keller, H
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La Mattina, F., Bednorz, J. G., Alvarado, S. F., Shengelaya, A., Müller, K. A., & Keller, H. (2009). Controlled oxygen vacancies and space correlation with Cr3+ in SrTiO3. Physical Review. B, Condensed Matter and Materials Physics, 80(7), 075122. https://doi.org/10.1103/PhysRevB.80.075122