Single molecule magnets from magnetic building blocks

ORAL

Abstract

We provide a basic set of magnetic building blocks that can be rationally assembled, similar to magnetic LEGO bricks, in order to create a huge variety of magnetic behavior. Using rare-earth centers and multipyridine ligands, fine-tuning of intra and intermolecular exchange interaction is demonstrated. We have investigated a series of molecules with monomeric, dimeric and trimeric lanthanide centers using SQUID susceptometry and Hall bar magnetometry. A home-made micro-Hall-probe magnetometer was used to measure magnetic hysteresis loops at mK temperatures and fields up to 17 T. All compounds show hysteresis below blocking temperatures of 3 to 4 K. The correlation of the assembly of the building blocks with the magnetic properties will be discussed.

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Authors

  • W. Kroener

    • Lehrstuhl f\"{u}r Experimentalphysik, Universit\"{a}t Erlangen, Germany

  • A. Paretzki

    • 1. Physikalisches Institut, Universit\"{a}t Stuttgart, Germany

  • C. Cervetti

    • 1. Physikalisches Institut, Universit\"{a}t Stuttgart, Germany

  • S. Hohloch

    • Institut f\"{u}r Anorganische Chemie, Universit\"{a}t Stuttgart, Germany

  • S. Rauschenbach

    • Max Planck Institut f\"{u}r Festk\"{o}rperforschung, Stuttgart, Germany

  • K. Kern

    • Max Planck Institut f\"{u}r Festk\"{o}rperforschung, Stuttgart, Germany

  • M. Dressel

    • 1. Physikalisches Institut, Universit\"{a}t Stuttgart, Germany

  • L. Bogani

    • 1. Physikalisches Institut, Universit\"{a}t Stuttgart, Germany

  • P. M\"{u}ller

    • Lehrstuhl f\"{u}r Experimentalphysik, Universit\"{a}t Erlangen, Germany