Structure and magnetism of V-doped SnO2 thin films: effect of the substrate

doi:10.1088/0953-8984/19/25/256204

Structure and magnetism of V-doped SnO₂ thin films: effect of the substrate

Jun Zhang et al 2007 J. Phys.: Condens. Matter 19 256204 (6pp) doi: 10.1088/0953-8984/19/25/256204

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Jun Zhang^1,2, R Skomski^1,2, L P Yue^1,2, Y F Lu^2,3 and D J Sellmyer^1,2
¹ Department of Physics and Astronomy, University of Nebraska, Lincoln, NE 68588, USA
² Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, NE 68588, USA
³ Department of Electrical Engineering, University of Nebraska, Lincoln, NE 68588, USA

Abstract. We report on the structure and magnetism of V-doped SnO₂ thin films grown by pulsed laser deposition. The structure and magnetic properties of the films strongly depend on the substrates on which the films are grown. Films grown on Al₂O₃ substrates are single crystalline and show anisotropic in-plane magnetic moments, while films grown on Si substrates are nanocrystalline and show no anisotropy. Compared with that of single-crystalline films, the magnetic moment of nanocrystalline films is higher at low V concentration, decreases more quickly as the V concentration increases, and is more sensitive to vacuum annealing. Our results suggest important roles for spin–orbit coupling and defects in the magnetism of diluted magnetic oxides.

Print publication: Issue 25 (27 June 2007)
Received 15 April 2007
Published 5 June 2007

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Structure and magnetism of V-doped SnO₂ thin films: effect of the substrate

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