Burrowing self-organized cobalt clusters into a gold substrate

Author： Padovani S.   Scheurer F.   Bucher J. P.  

Publisher： Edp Sciences

E-ISSN： 1286-4854|45|3|327-333

ISSN： 0295-5075

Source： EPL (EUROPHYSICS LETTERS), Vol.45, Iss.3, 2010-03, pp. : 327-333

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

The mechanism of cobalt-cluster incorporation into a Au(111) substrate is followed by variable temperature STM, Auger spectroscopy, and in situ magneto-optic Kerr(MOKE) measurements. Upon thermal activation, cobalt clusters sink into the substrateby simultaneously expelling gold atoms which, in turn, contribute by embedding theremaining cobalt clusters. Although important mass transport occurs during thisoperation, MOKE indicates that the clusters remain globally undisturbed, until finally,irreversible cluster fragmentation and dissolution occur above 600 K.

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