Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.jmmm.2011.12.004
Title: Effect of oxygen pressure on microstructure and magnetic properties of strontium hexaferrite (SrFe 12O 19) film prepared by pulsed laser deposition
Authors: Masoudpanah, S.M.
Seyyed Ebrahimi, S.A.
Ong, C.K. 
Keywords: Perpendicular magnetic anisotropy
Pt(1 1 1) underlayer
Pulsed laser deposition
Strontium hexaferrite film
Issue Date: Apr-2012
Citation: Masoudpanah, S.M., Seyyed Ebrahimi, S.A., Ong, C.K. (2012-04). Effect of oxygen pressure on microstructure and magnetic properties of strontium hexaferrite (SrFe 12O 19) film prepared by pulsed laser deposition. Journal of Magnetism and Magnetic Materials 324 (7) : 1440-1443. ScholarBank@NUS Repository. https://doi.org/10.1016/j.jmmm.2011.12.004
Abstract: The effects of oxygen pressure during deposition on microstructure and magnetic properties of strontium hexaferrite (SrFe 12O 19) films grown on Si (100) substrate with Pt (111) underlayer by pulsed laser deposition have been investigated. X-ray diffraction pattern confirms that the films have c-axis perpendicular orientation. The c-axis dispersion (Δθ 50) increases and c-axis lattice parameter decreases with increasing oxygen pressure. The films have hexagonal shape grains with diameter of 150250 nm as determined by atomic force microscopy. The coercivities in perpendicular direction are higher than those in in-plane direction, which shows the films have perpendicular magnetic anisotropy. The saturation magnetization and anisotropy field for the film deposited in oxygen pressure of 0.13 mbar are comparable to those of the bulk strontium hexaferrite. Higher oxygen pressure leads to the films having higher coercivity and squareness. The coercivity in perpendicular and in-plane directions of the film deposited in oxygen pressure of 0.13 mbar are 2520 Oe and 870 Oe, respectively. © 2011 Elsevier B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
URI: http://scholarbank.nus.edu.sg/handle/10635/96331
ISSN: 03048853
DOI: 10.1016/j.jmmm.2011.12.004
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