Phys. Rev. Lett. 102, 257203 (2009) [4 pages]Magnetic Anisotropy and Magnetization Dynamics of Individual Atoms and Clusters of Fe and Co on Pt(111)Received 19 March 2009; published 25 June 2009 The recently discovered giant magnetic anisotropy of single magnetic Co atoms raises the hope of magnetic storage in small clusters. We present a joint experimental and theoretical study of the magnetic anisotropy and the spin dynamics of Fe and Co atoms, dimers, and trimers on Pt(111). Giant anisotropies of individual atoms and clusters as well as lifetimes of the excited states were determined with inelastic scanning tunneling spectroscopy. The short lifetimes due to hybridization-induced electron-electron scattering oppose the magnetic stability provided by the magnetic anisotropies. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.257203
DOI:
10.1103/PhysRevLett.102.257203
PACS:
75.30.Gw, 75.30.Et, 75.30.Hx, 75.40.Gb
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