The Influence of Annealing Conditions on Structure and Magnetic Properties of Nanodimensional Fe50Pt50 Film on Planar SiO2(100 nm)/Si(100) Substrates

In this paper, we study the influence of 3-nm-thick Ag intermediate layer and annealing duration in a vacuum at the temperature of 600°С on formation of chemically ordered L10(FePt) phase in the nanodimensional film composition (NFC) of Fe50Pt50(15 nm)/Ag(3 нм)/ Fe50Pt50(15 nm) on the planar SiO2(100 нм)/Si(100). substrate. Its structure and magnetic properties are investigated. We show that the formation of L10(FePt) phase takes place during annealing whose duration is 30 мин. min. The subsequent increase of annealing duration does not result in phase transformations. We determine that NFC under study is mаgneto-anisotropic. Grains with the c-axis of easy magnetization parallel oriented to the sample surface reach the magnetic saturation, unlike grains whose c-axis of easy magnetization is perpendicularly oriented to the film surface.

Publication year: 
С. 79–83., укр., Іл. 6. Бібліогр.: 8 назв.

1. Carbucicchio M., Ciprian R., Palombarini G. Morphological and microstructural study of L10-ordered FePt and L10-FePt/Fe ultrathin films grown by UHV e-beam evaporation technique // J. of Magnetism and Magnetic Materials. — 2010. — 322. — P. 1307—1310.
2. Microstructure and magnetic properties of L10-FePt thin films prepared under high pressures / Xiaohong Li, Fengqing Wang, Yanguo Liu et al. // Applied Physics Letters. — 2009. — 94. — P. 172512 (1—3).
3. Wang B., Barmak K., Klemmer T.J. A1 to L10 transformation in FePt films with ternary alloying additions of Ag and Au // IEEE Transactions of Magnetics. — 2010. — 46, N 6. — P. 1773—1776.
4. Perpendicular FePt-based exchange-coupled composite media / D. Makarov, J. Lee, C. Brombacher et al. // Applied Physics Letters. — 2010. — 96. — P. 062501 (1—3).
5. On the relationship of magnetocrystalline anisotropy and stoichiometry in epitaxial L10 CoPt (001) and FePt (001) thin films / K. Barmak, J. Kim, L.H. Lewis et al. // J. Appl. Physics. — 2005. — 98. — P. 033904 (1—7).
6. Исследования тонких пленок FePt, синтезированных методом последовательного распыления / А.С. Камзин, Е.В. Снеткова, З. Янг и др. // Письма в ЖТФ. — 2008. — 34, вып. 1. — С. 57—64.
7. Index by Strukturbericht Designation. — http://cst-www.
8. Yan M.L., Powers N., Sellmyer D.J. Highly oriented nonepitaxially grown L10 FePt films // J. Appl. Physics. — 2003. — 93, N 10. — P. 8292—8294.

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