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Substrate temperature and oxygen pressure dependence of pulsed laser-deposited Sr ferrite films

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Papakonstantinou, P, O'Neill , M, Atkinson, R, Salter, IW and Gerber, R (1996) Substrate temperature and oxygen pressure dependence of pulsed laser-deposited Sr ferrite films. Journal of Magnetism and Magnetic Materials , 152 . pp. 401-410. [Journal article]

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DOI: 10.1016/0304-8853(95)00498-X

Abstract

The effect of substrate temperature and oxygen pressure on the microstructure, magnetic and magneto-optical properties of Sr ferrite (SrM) films grown on (001) single-crystal sapphire substrates by pulsed laser deposition has been investigated. Polycrystalline SrM films with perpendicular magnetic anisotropy could be prepared under a wide range of oxygen pressures and relatively high temperatures, sufficient to crystallise the material. However, an almost exclusive c-axis orientation normal to the film plane could be attained only at a narrow operational window centered at 0.1 mbar and 840°C. The magneto-optical properties of the films were comparable to those of the bulk barium hexaferrite single-crystal material. In addition, results obtained by atomic force microscopy provide convincing evidence that the growth of Sr ferrite on sapphire takes place by a spiral growth mechanism.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:17058
Deposited By:Professor Pagona Papakonstantinou
Deposited On:11 Feb 2011 10:15
Last Modified:29 Apr 2014 15:53

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