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American Chemical Society, Journal of Physical Chemistry Letters, 13(4), p. 2171-2176, 2013

DOI: 10.1021/jz401115q

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Room-Temperature Ferromagnetism in Reduced Rutile TiO2−δ Nanoparticles

Journal article published in 2013 by Marina Parras, Áurea Varela, Raquel Cortés-Gil, Khalid Boulahya, Antonio Hernando ORCID, José M. González Calbet ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We report a synthesis method to stabilize TiO2 rutile nanoparticles (around 10 nm) and keep the particle size when reduced down to TiO1.84. TiO2−δ nanoparticles exhibit room-temperature ferromagnetism that becomes stronger for TiO1.84. The reduction mechanism to stabilize Magneli phases excludes a relevant influence of oxygen vacancies in the modification of the magnetic properties. The arrangement of Ti3+ could give rise to hopping of the single 3d electron inducing local ferromagnetic-like behavior.