2004/01/16 by J. M. D. Coey, A. P. Douvalis, Alexios P. Douvalis +2 · 3 citations
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Curie temperature #Electronic and Structural Properties of Oxides #Ferromagnetism #Gas Sensing Nanomaterials and Sensors #Magnetic moment #Magnetization #Materials science #Nanotechnology #Physics #Pulsed laser deposition #Spontaneous magnetization #Superexchange #Thin film #ZnO doping and properties #cond-mat
paper · pdf · doi:10.1063/1.1650041
13 pages, 4 figures, to be published in Applied Physics Letters (Feb. 2004)
arxiv created 2004/01/16 · openalex publication_date 2004/02/12 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 Fe57 Mössbauer 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.