Interplay between structural and magnetic properties of L1{sub 0}-FePt(001) thin films directly grown on MgO(001)

Journal Article · Wed Apr 01 04:00:00 EDT 2009 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3093955· OSTI ID:21190120

Laenens, B; Almeida, F M; Planckaert, N; Temst, K; Meersschaut, J; Vantomme, A ^[1]; Rentenberger, C; Rennhofer, M; Sepiol, B ^[2]

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1. Instituut voor Kern-en Stralingsfysica and INPAC, K.U. Leuven, Celestijnenlaan 200 D, B-3001 Leuven (Belgium)
2. Fakultaet fuer Physik, Universitaet Wien, Strudlhofgasse 4, A-1090 Wien (Austria)

We present a detailed study of the magnetic and structural properties of L1{sub 0}-FePt thin films. The films are prepared via molecular beam epitaxy directly onto MgO(001) substrates, i.e., without buffer layer. Despite the large lattice misfit between the in-plane lattice parameters of L1{sub 0} FePt and MgO, highly ordered thin films are obtained with the easy magnetization c axis perpendicular to the film plane. Via high resolution transmission electron microscopy and Rutherford backscattering measurements we focus on the FePt/MgO interface to study the misfit relaxation and the defect density. Further, the influence of elevated substrate temperatures and of postgrowth high temperature annealing on the structural and magnetic properties is discussed.

• OSTI ID: 21190120
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 105; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANNEALING
CRYSTAL GROWTH
DISLOCATIONS
IRON ALLOYS
LATTICE PARAMETERS
LAYERS
MAGNESIUM OXIDES
MAGNETIC PROPERTIES
MAGNETIZATION
MOLECULAR BEAM EPITAXY
PLATINUM ALLOYS
RUTHERFORD BACKSCATTERING SPECTROSCOPY
SUBSTRATES
TEMPERATURE DEPENDENCE
THIN FILMS
TRANSMISSION ELECTRON MICROSCOPY