Morphological and microstructural study of L1 0-ordered FePt and L1 0-FePt/Fe ultrathin films grown by UHV e-beam evaporation technique

Ultrathin films of L1 0-ordered FePt alloy with different thickness were grown by UHV e-beam evaporation technique. In this ultrathin regime, the increase of the thickness induces a strong improvement of the magnetic properties followed by a decrease of the grain size. Starting from these hard layer...

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Bibliographic Details
Published inJournal of magnetism and magnetic materials Vol. 322; no. 9; pp. 1307 - 1310
Main Authors Carbucicchio, M., Ciprian, R., Palombarini, G.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 2010
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Summary:Ultrathin films of L1 0-ordered FePt alloy with different thickness were grown by UHV e-beam evaporation technique. In this ultrathin regime, the increase of the thickness induces a strong improvement of the magnetic properties followed by a decrease of the grain size. Starting from these hard layers, FePt/Fe/FePt trilayers with different thickness of the outermost layer have been grown. The samples show a single-phase magnetic behaviour and a strong perpendicular anisotropy thanks to the exchange-coupling that established at the soft/hard interfaces. By increasing the thickness of the outer layer, a strong reduction of the switching field distribution has been obtained with the appearance of a predominant exchange-type interaction among the magnetic grains. The morphology is characterized by well separated and elongated islands, while the magnetic pattern shows finely dispersed bubble domains.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2009.04.028