CobaltMaghrebV1, Main, Merge, bibRecord, 000977

Structural and magnetic properties of evaporated Co/Si(100) and Co/glass thin films

Identifieur interne : 000977 ( Main/Merge ); précédent : 000976; suivant : 000978

Structural and magnetic properties of evaporated Co/Si(100) and Co/glass thin films

Auteurs : A. Kharmouche [Algérie, France] ; S-M Chrif [France] ; A. Bourzami [Algérie] ; A. Layadi [Algérie] ; G. Schmerber [France]

Source :

Journal of Physics D: Applied Physics [ 0022-3727 ] ; 2004.

RBID : ISTEX:0DE3815B0F45C57FF44B0A835B501C567777C92D

Abstract

A series of Co thin films have been evaporated onto Si(100) and glass substrates. The Co thickness, tCo, ranges from 50 to 195nm. The structural and magnetic properties have been investigated by x-ray diffraction, hysteresis curves, Brillouin light scattering and magnetic force microscopy (MFM) techniques. The Co thin films are found to be polycrystalline with (0001) texture. There is an increase of the grain size with increasing film thickness. The coercive fields range from values as low as 2Oe in thinner films to the highest values, 2500Oe, in 195nm thick Co/Si films. The magnetocrystalline anisotropy field Ha decreases as the thickness increases; surface and stress induced anisotropies seem to contribute to the value of Ha. MFM images reveal a well-defined stripe pattern for thicker Co/Si samples. Such domains are not observed in the case of the thinner films. These so-called weak-stripe domains appear in magnetic films with a low or intermediate perpendicular anisotropy. Similar behaviour was observed in Co/glass samples, in addition, cross-tie walls were seen in thinner ones.

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https://api.istex.fr/document/0DE3815B0F45C57FF44B0A835B501C567777C92D/fulltext/pdf

DOI: 10.1088/0022-3727/37/18/014

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<front><div type="abstract">A series of Co thin films have been evaporated onto Si(100) and glass substrates. The Co thickness, tCo, ranges from 50 to 195nm. The structural and magnetic properties have been investigated by x-ray diffraction, hysteresis curves, Brillouin light scattering and magnetic force microscopy (MFM) techniques. The Co thin films are found to be polycrystalline with (0001) texture. There is an increase of the grain size with increasing film thickness. The coercive fields range from values as low as 2Oe in thinner films to the highest values, 2500Oe, in 195nm thick Co/Si films. The magnetocrystalline anisotropy field Ha decreases as the thickness increases; surface and stress induced anisotropies seem to contribute to the value of Ha. MFM images reveal a well-defined stripe pattern for thicker Co/Si samples. Such domains are not observed in the case of the thinner films. These so-called weak-stripe domains appear in magnetic films with a low or intermediate perpendicular anisotropy. Similar behaviour was observed in Co/glass samples, in addition, cross-tie walls were seen in thinner ones.</div>
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Structural and magnetic properties of evaporated Co/Si(100) and Co/glass thin films

Structural and magnetic properties of evaporated Co/Si(100) and Co/glass thin films

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Abstract

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