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

P Papakonstantinou, M O'Neill, R Atkinson, IW Salter, R Gerber

Research output: Contribution to journalArticle

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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.
LanguageEnglish
Pages401-410
JournalJournal of Magnetism and Magnetic Materials
Volume152
DOIs
Publication statusPublished - 6 Jul 1996

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pressure dependence
ferrites
pulsed lasers
oxygen
sapphire
optical properties
temperature
single crystals
pulsed laser deposition
barium
atomic force microscopy
microstructure
anisotropy

Cite this

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title = "Substrate temperature and oxygen pressure dependence of pulsed laser-deposited Sr ferrite films",
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.",
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Substrate temperature and oxygen pressure dependence of pulsed laser-deposited Sr ferrite films. / Papakonstantinou, P; O'Neill, M; Atkinson, R; Salter, IW; Gerber, R.

In: Journal of Magnetism and Magnetic Materials, Vol. 152, 06.07.1996, p. 401-410.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Substrate temperature and oxygen pressure dependence of pulsed laser-deposited Sr ferrite films

AU - Papakonstantinou, P

AU - O'Neill, M

AU - Atkinson, R

AU - Salter, IW

AU - Gerber, R

PY - 1996/7/6

Y1 - 1996/7/6

N2 - 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.

AB - 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.

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DO - 10.1016/0304-8853(95)00498-X

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