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capítulo de libro
"Ferromagnetism in Transition Metal Doped Rutile TiO2"
L.A. Errico, A. Mudarra Navarro, C. Rodriguez Torres, A.F. Cabrera, V. Bolovol, M. Rentería and M. Weissmann
Capítulo 8 del libro "Rutile: Properties, Synthesis and Applications", Ed. J. Low, Earth Sciences in the 21st Century, Nova Science Publishers (2012), 240 pp
ISBN: 978-1-61942-233-9
In this work we review our theoretical investigation of TM-doped rutile TiO2 system (TM: Mn, Fe, Co, Ni, and Cu) for different concentrations and distributions of these impurities. The effect of oxygen vacancies on the magnetic moments and the magnetic alignment for pure and doped TiO2 is studied as a function of vacancy concentration and distribution. We also review the experimental work done in our laboratory using X-ray absorption, magnetometric techniques and Mössbauer spectroscopy. The combined theoretical and experimental studies enabled us to characterize the local structure around the TM impurities in rutile TiO2 unambiguously and support the conclusion that oxygen vacancies are fundamental for the ferromagnetic response of these systems, explaining the diversity of magnetic moments observed experimentally for samples grown in different conditions.
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