Dresden 2003 – wissenschaftliches Programm
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MA: Magnetismus
MA 12: Oberfl
ächenmagnetismus
MA 12.12: Vortrag
Dienstag, 25. März 2003, 13:00–13:15, HSZ/401
Symmetry Independence of Magnetic Hyperfine Fields — •Kay Potzger1, Mark Prandolini1, Yurij Manzhur1, Andreas Weber1, Hartmut H. Bertschat1 und Marc Dietrich2 — 1Bereich Strukturphysik, Hahn-Meitner-Institut Berlin GmbH, D 14109 Berlin, Germany — 2ISOLDE - Collaboration, CERN, Geneve 23, Switzerland
Induced magnetism on non-magnetic single isolated radioactive Cd probe atoms were investigated on Ni surface orientations (111) and (001). Using the perturbed angular correlation spectroscopy (PAC), atomic resolution is achieved. Different atomic surface sites have differing Ni coordination numbers, (i.e. the number of Ni nearest neighbors). Recently, a study was made on the coordination number dependence of the induced magnetic hyperfine field of non-magnetic Cd atoms on Ni (001) and (111) surfaces, the results demonstrate a continuous nonlinear dependence of the induced magnetic hyperfine field [1]. In this contribution, we show that for Cd probe atoms having the same coordination number at sites on different surface orientations and even with different surface symmetry, the induced magnetic hyperfine field is the same at these sites. [1] K. Potzger, A. Weber, H.H. Bertschat, and W.-D. Zeitz, M. Dietrich, Coordination-Number Dependence of Magnetic Hyperfine Fields at 111Cd on Ni Surfaces Phys. Rev. Lett. 88, 247201 (2002)