Core-Shell Magnetic Behavior of Ultrathin Films Prepared by Sputtering at Very Low Temperatures

We report a magnetic characterization of iron thin films of 6 nm prepared on Si (001) substrates by sputtering at different substrate temperatures. Magnetization loops and zero field cooling-field cooling measurements were performed to unveil the magnetic features of such systems. Magnetic parameter...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2008-11, Vol.44 (11), p.2792-2795
Main Authors: Jimenez-Villacorta, F., Martinez-Morillas, R., Salas, E., Cespedes, E., Prieto, C.
Format: Article
Language:English
Subjects:
Applied sciences
Cooling
Cooling systems
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Ferromagnetic materials
Iron
Iron oxides
Magnetic cores
Magnetic field measurement
Magnetic films
magnetic materials
Magnetism
Magnetization
Materials science
Metals. Metallurgy
Methods of deposition of films and coatings
film growth and epitaxy
Other topics in materials science
Performance evaluation
Physics
Production techniques
Semiconductor thin films
Silicon substrates
Sputtering
Surface treatment
Temperature
Thin films
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Summary:We report a magnetic characterization of iron thin films of 6 nm prepared on Si (001) substrates by sputtering at different substrate temperatures. Magnetization loops and zero field cooling-field cooling measurements were performed to unveil the magnetic features of such systems. Magnetic parameters show that films prepared at very low temperature ( T S =200 K) present features of a core-shell granular systems, formed by ferromagnetic iron grains surrounded by an antiferromagnetic iron oxide phase.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2008.2001784