Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 33: Scanning probe techniques III
O 33.6: Vortrag
Donnerstag, 30. März 2006, 12:30–12:45, PHY C213
High-ordered arrays of single molecular magnets on Cu(111) — •Lucia Vitali1, M.Alexander Schneider1, Mario Ruben2, Adriano Mosca conte3, Stefano Fabris3, Stefano Baroni3, and Klaus Kern1 — 1Max-Panck-Institute for solid state research Stuttgart — 2Institute of Nanotechnology Karlsruhe — 3INFM CNR DEMOCRITOS National Simulation Center Trieste
Molecular magnets are promising candidates for the realization of molecule-based information storage media within the nanometer regime. So far, the difficulty of forming ordered structures on surfaces prevented their application. Here we report on the formation of long-range ordered layers of a recently discovered class of single-molecular-magnets (SMMs), called lanthanide double-deckers, on the Cu(111) surface. These, consisting of a single lanthanide ion located between two phthalocyanine units, act as isolated magnetic domains exhibiting a magnetization hysteresis below a characteristic blocking temperature of 40K[1]. The highly-ordered hexagonal networks have been imaged and analyzed in situ by Scanning Tunneling Microscopy and Spectroscopy at 6K. The direct comparison of the spectroscopic results with density-functional-theory calculations of the molecule in the gas phase suggests that the molecules are not affected by the deposition and contact to the metallic substrate.
[1] N. Ishikawa et al., J. Am. Chem. Soc. 125, 8694 (2003)