Optical and magneto-optical properties of Co-Ti-substituted barium hexaferrite single crystals and thin films produced by laser ablation deposition

R Atkinson, P Papakonstantinou, IW Salter, R Gerber

Research output: Contribution to journalArticle

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Abstract

Ellipsometry, reflectance photometry and Kerr polarimetry have been used to determine the optical and magneto-optical properties of bulk single-crystal platelets and thin films of Co-Ti-doped barium hexaferrite. The single crystals were grown by a slow-cooling flux method and the thin films were produced by pulsed laser ablation deposition onto single-crystal Al2O3 substrates at 840°C. The complex refractive index (n) and magneto-optic Voigt parameter (Q) were determined over the spectral range 350–850 nm and the reliability of the data tested by comparison with photometric measurements of reflectance. Although the optical constants of the thin films could not readily be obtained over the entire spectral range by ellipsometry, their magneto-optical performance in terms of the Kerr rotation and ellipticity compared well with predictions based on the fundamental data for the bulk material.
LanguageEnglish
Pages222-231
JournalJournal of Magnetism and Magnetic Materials
Volume128
DOIs
Publication statusPublished - 13 Jun 1994

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laser ablation
barium
optical properties
ellipsometry
single crystals
thin films
reflectance
polarimetry
magneto-optics
ellipticity
platelets
photometry
pulsed lasers
refractivity
cooling
predictions

Cite this

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abstract = "Ellipsometry, reflectance photometry and Kerr polarimetry have been used to determine the optical and magneto-optical properties of bulk single-crystal platelets and thin films of Co-Ti-doped barium hexaferrite. The single crystals were grown by a slow-cooling flux method and the thin films were produced by pulsed laser ablation deposition onto single-crystal Al2O3 substrates at 840°C. The complex refractive index (n) and magneto-optic Voigt parameter (Q) were determined over the spectral range 350–850 nm and the reliability of the data tested by comparison with photometric measurements of reflectance. Although the optical constants of the thin films could not readily be obtained over the entire spectral range by ellipsometry, their magneto-optical performance in terms of the Kerr rotation and ellipticity compared well with predictions based on the fundamental data for the bulk material.",
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Optical and magneto-optical properties of Co-Ti-substituted barium hexaferrite single crystals and thin films produced by laser ablation deposition. / Atkinson, R; Papakonstantinou, P; Salter, IW; Gerber, R.

Vol. 128, 13.06.1994, p. 222-231.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Optical and magneto-optical properties of Co-Ti-substituted barium hexaferrite single crystals and thin films produced by laser ablation deposition

AU - Atkinson, R

AU - Papakonstantinou, P

AU - Salter, IW

AU - Gerber, R

PY - 1994/6/13

Y1 - 1994/6/13

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AB - Ellipsometry, reflectance photometry and Kerr polarimetry have been used to determine the optical and magneto-optical properties of bulk single-crystal platelets and thin films of Co-Ti-doped barium hexaferrite. The single crystals were grown by a slow-cooling flux method and the thin films were produced by pulsed laser ablation deposition onto single-crystal Al2O3 substrates at 840°C. The complex refractive index (n) and magneto-optic Voigt parameter (Q) were determined over the spectral range 350–850 nm and the reliability of the data tested by comparison with photometric measurements of reflectance. Although the optical constants of the thin films could not readily be obtained over the entire spectral range by ellipsometry, their magneto-optical performance in terms of the Kerr rotation and ellipticity compared well with predictions based on the fundamental data for the bulk material.

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