Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 1: Focus: Molecularly Functionalized Low-Dimensional Systems I - organized by Antonio Setaro, Carola Meyer, Aravind Vijayaraghvan and Matteo Mannini

CPP 1.4: Vortrag

Montag, 12. März 2018, 10:30–10:45, C 130

Peapods with endofullerene single-molecule magnets — •Rasmus Westerström¹, Fabian Fritz^2,3, Christin Schleier⁴, Stanislav M Avdoshenko⁴, Alexey A Popov⁴, and Carola Meyer^2,3 — ¹Synchrotron Radiation Research, Lund University, 22100 Lund, Sweden — ²Department of Physics, University Osnabrück, 49076 Osnabrück, Germany — ³Peter Grünberg Institute (PGI-6), Forschungszentrum Jülich GmbH, 52425 Jülich, Germany — ⁴Leibniz Institute for Solid State and Materials Research (IFW), 01069 Dresden, Germany

Rare-earth-based endofullerene nanomagnets belong to the group of single-molecule magnets (SMMs), a class of molecules that exhibits an intrinsic magnetic bistability at low temperatures. Here we present a structural, chemical, and magnetic characterization of one-dimensional chains of endofullerene nanomagnets encapsulated in carbon nanotubes (CNTs), so-called peapods. It is demonstrated that unique peapod bundles can be located and studied by scanning transmission X-ray microscopy (STXM) and high-resolution transmission electron microscopy (HRTEM). By correlating HRTEM and STXM images, we show that structures down to 30 nm are resolved with chemical contrast and record nanoscale X-ray absorption spectra from endohedral lanthanide ions embedded in individual CNT bundles. Magnetic characterization of samples consisting of bundles of CNTs filled with Dy₂ScN@C₈₀ SMMs was performed using X-ray magnetic circular dichroism (XMCD), and the magnetic properties of these one-dimensional arrays will be discussed.