Regensburg 2010 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 23: Micro- and Nanostructured Magnetic Materials III

MA 23.6: Vortrag

Donnerstag, 25. März 2010, 11:30–11:45, H3

Magnetic properties of bimetallic nanoislands deposited on Pt(111) — •Sven Bornemann¹, Jan Minár¹, Sergey Mankovsky¹, Safia Ouazi², Stefano Rusponi², Harald Brune², Julie B. Staunton³, and Hubert Ebert¹ — ¹Department Chemie und Biochemie, LMU München, 81377 München, Germany — ²Institute of Condensed Matter Physics, EPF Lausanne, Switzerland — ³Department of Physics, University of Warwick, United Kingdom

In recent years, magnetic nanostructures on surfaces have been the subject of intense research activities which are driven by fundamental as well as practical interests. One of the central questions for future applications is how the magnetic properties like the magnetic anisotropy evolve in-between single magnetic adatoms and submonolayer magnetic particle arrays. Experimentalists have succeeded in assembling surface supported single domain particles where the magnetic moments of all atoms form a so-called macrospin and it is commonly believed that the special magnetic characteristics of such structures are mainly due to their exposed low-coordinated edge atoms. For some of these novel systems, however, unexpected low anisotropies or reduced magnetic moments are observed which makes it difficult to find promising candidates for real life technical applications. To support these experimental efforts the fully relativistic spin-polarized KKR method has been applied to investigate the influence of spin-orbit coupling on the magnetic properties of various FeCo nanostructures deposited on Pt(111). The discussion will focus on interface and alloy contributions to the magnetic anisotropy in these systems.