Ferromagnetism in Fe-doped SnO2 thin films

By J. Coey, A. Douvalis, C. Fitzgerald, M. Venkatesan. 2004

909 citations recorded by the source corpus.

Thin films grown by pulsed-laser deposition from targets of Sn0.95Fe0.05O2 are transparent ferromagnets with Curie temperature and spontaneous magnetization of 610 K and 2.2 A m2 kg−1, respectively. The 57Fe Mossbauer spectra show the iron is all high-spin Fe3+ but the films are magnetically inhomogeneous on an atomic scale, with only 23% of the iron ordering magnetically. The net ferromagnetic moment per ordered iron ion, 1.8 μB, is greater than for any simple iron oxide with superexchange interactions. Ferromagnetic coupling of ferric ions via an electron trapped in a bridging oxygen vacancy (F center) is proposed to explain the high Curie temperature.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/761e3994ff045d6af84c1277ba7d419c59d9e84f

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In Electrical and Electronic Engineering

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Citations in the corpus

• Oxygen vacancy-mediated enhanced ferromagnetism in undoped and Fe-doped TiO2 nanoribbons (2014, background): “Coey et al [53] reported that an electron trapped in the Ov defect level creates an F-centre.”