Jun Zhang et al 2007 J. Phys.: Condens. Matter 19 036210 doi:10.1088/0953-8984/19/3/036210
Jun Zhang1,2, X Z Li2, J Shi2,3, Y F Lu2,3 and D J Sellmyer1,2
Show affiliationsWe report the structure and magnetic properties of Zn1−xMnxO thin films grown on Si(001) substrates by pulsed laser deposition. Structure and phase evolution with Mn doping has been studied using x-ray diffraction, electron diffraction, and high-resolution electron microscopy. The undoped and 1% Mn-doped ZnO films are completely (001) oriented, and further Mn doping deteriorates the (001) orientation. For Mn concentrations below 3%, only the hexagonal ZnO phase exists in the films without secondary phases. As the Mn concentration reaches 5%, secondary phase Mn2O3 was found aggregating at grain boundaries. All the Mn-doped films show ferromagnetic properties at room temperature, and the magnetic moment decreases as the Mn concentration increases. Our results suggest that the ferromagnetism observed in Zn1−xMnxO thin films is intrinsic rather than associated with secondary phases.
68.55.-a Thin film structure and morphology
75.30.Cr Saturation moments and magnetic susceptibilities
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
68.55.Ln Defects and impurities: doping, implantation, distribution, concentration, etc.
Issue 3 (24 January 2007)
Received 2 November 2006
Published 5 January 2007
Jun Zhang et al 2007 J. Phys.: Condens. Matter 19 036210
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