Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Growth and adhesion of biphasic crystalline-amorphous Sm/Fe-Ta-N magnetic nanospheroids on a Ta surface
Δημιουργός/Συγγραφέας:	[EL] Κεφαλάς, Αλκιβιάδης Κωνσταντίνος[EN] Cefalas, Alciviadis Constantinos Kovac, J. [EL] Σαραντοπούλου, Ευαγγελία[EN] Sarantopoulou, Evangelia Drazic, G. [EL] Κόλλια, Ζωή[EN] Kollia, Zoe Kobe, S.
Εκδότης:	John Wiley & Sons Limited
Τόπος έκδοσης:	Chichester
Ημερομηνία:	2008-03-04
Γλώσσα:	Αγγλικά
ISSN:	0142-2421
DOI:	10.1002/sia.2752
Περίληψη:	The adhesion strength of magnetic films of intermetallic alloys on different substrates specifies their long-term magnetic functionality, among other physicochemical characteristics of the films. Nanospheroids of Sm/Fe-Ta-N intermetallic alloys were grown from the Sm13.8Fe82.2Ta4.0 target by pulse laser deposition at 157 nm. The high-temperature, liquefied nanodroplets were formed in the plume. They eventually solidified on the surface of a Ta substrate covered with a thin Talo layer in the form of biphasic nanospheroids, consisting of a crystalline nucleus surrounded by an amorphous mantle. Such nanostructures exhibit a ferromagnetic response because the oxidization of the inner crystalloid nucleus, which specifies the magnetic properties, is prevented by the amorphous spheroid mantle. The strength of adhesion of the nanodroplets on the Ta substrate was inversely proportional to the Sm/Fe concentration. The nanodroplets with high Sm/Fe concentration were bound on the Ta substrate with a large average contact angle of similar to 161.4 degrees due to the strong intermolecular forces in the alloy. The nanodroplets with low Sm/Fe concentration exhibited hydrophilic binding, and they were strongly attached to the Ta substrate with an average contact angle of 11.3 degrees. Magnetic force microscopy measurements revealed that the magnetic response of the nanospheroids was proportional to the contact angle. Copyright
Τίτλος πηγής δημοσίευσης:	Surface and Interface Analysis
Τόμος/Κεφάλαιο:	40
Τεύχος:	3-4
Σελίδες:	364-367
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	hydrophobic hydrophilic adhesion wetting coefficient contact angle nanomagnetism nanospheroids nanodroplets nanocrystals VUV laser ablation rare earth alloys pulse laser deposition XPS AFM MFM
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2008 John Wiley & Sons, Ltd.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο