Prof. Daniel Ruiz-Molina Profile

Prof. Daniel Ruiz-Molina

at Univ Autònoma de Barcelona

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Proceedings Article | 29 April 2003 Paper

Single-molecule magnets on a polymeric thin film as magnetic quantum bits

Daniel Ruiz-Molina, Jordi Gomez, Marta Mas-Torrent, Ana Isabel Balana, Nues Domingo, Javier Tejada, Maria Teresa Martinez, Concepcio Rovira, Jaume Veciana

Proceedings Volume 5118, (2003) https://doi.org/10.1117/12.499143

KEYWORDS: Magnetism, Manganese, Thin films, Molecules, Polymers, Polymer thin films, Molecular aggregates, Nanocomposites, Chlorine, Atomic force microscopy

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Single-molecule magnets (SMM) have a large-spin ground state with appreciable magnetic anisotropy, resulting in a barrier for the spin reversal As a consequence, interesting magnetic properties such as out-of-phase ac magnetic susceptibility signals and stepwise magnetization hysteresis loops are observed. In addition to resonant magnetization tunnelling, during the last few years several other interesting phenomena have also been reported. The origin of the slow magnetization relaxation rates as well as of other phenomena are due to individual molecules rather than to long-range ordering; as confirmed by magnetization relaxation and heat capacity studies. Therefore, SMM represent nanoscale magnetic particles of a sharply defined size that offer the potential access to the ultimate high-density information storage devices as well as for quantum computing applications. However, if a truly molecular computational device based on SMM is to be achieved, new systematic studies that allow us to find a proper way to address properly oriented individual molecules or molecular aggregates onto the surface of a thin film, where each molecule or molecular aggregate can be used as a bit of information, are highly required. Here we report a new soft, reliable and simple methodology to address individual Mn₁₂ molecules onto a film surface, as revealed by Atomic Force Microscopy (AFM) and Magnetic Force Microscopy (MFM) images. Moreover, the advantageous properties of polymeric matrices, such as flexibility, transparency and low density, make this type of materials very interesting for potential applications.

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