Dresden 2003 – scientific programme

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MA: Magnetismus

MA 12: Oberfl
ächenmagnetismus

MA 12.12: Talk

Tuesday, March 25, 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)