Title :
Core-Shell Magnetic Behavior of Ultrathin Films Prepared by Sputtering at Very Low Temperatures
Author :
Jim?©nez-Villacorta, F?©lix ; Morillas, Roc?o Mart?nez ; Salas, Eduardo ; C?©spedes, Eva ; Prieto, Carlos
Author_Institution :
Inst. de Cienc. de Mater. de Madrid, Consejo Super. de Investig. Cientificas (ICMM-CSIC), Cantoblanco
Abstract :
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.
Keywords :
antiferromagnetic materials; ferromagnetic materials; granular materials; iron; magnetic thin films; magnetisation; metallic thin films; sputter deposition; Fe; Si; Si (001) substrates; antiferromagnetic iron oxide phase; core-shell granular systems; core-shell magnetic behavior; ferromagnetic iron grains; iron thin films; magnetization loops; size 6 nm; sputtering; ultrathin films; zero field cooling-field cooling measurements; Thin films; magnetic materials;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2008.2001784
