A Stable Pentagonal Bipyramidal Dy(III) Single-Ion Magnet with a Record Magnetization Reversal Barrier over 1000 K

Single-molecule magnets (SMMs) with a large spin reversal barrier have been recognized to exhibit slow magnetic relaxation that can lead to a magnetic hysteresis loop. Synthesis of highly stable SMMs with both large energy barriers and significantly slow relaxation times is challenging. Here, we report two highly stable and neutral Dy(III) classical coordination compounds with pentagonal bipyramidal local geometry that exhibit SMM behavior. Weak intermolecular interactions in the undiluted single crystals are first observed for mononuclear lanthanide SMMs by micro-SQUID measurements. The investigation of magnetic relaxation reveals the thermally activated quantum tunneling of magnetization through the third…

• AN
  Agence Nationale de la Recherche

  Award: ANR-13-BS10
• NN
  National Natural Science Foundation of China

  Awards: 21371183, 91122032, 91422302
• MO
  Ministry of Education of the People's Republic of China
• MO
  Ministry of Science and Technology of the People's Republic of China

  Awards: 2012CB821704, 2014CB845602
• VO
  Vlaamse Overheid
• FW
  Fonds Wetenschappelijk Onderzoek
• NS
  Natural Science Foundation of Guangdong Province

  Award: S2013020013002
• SF
  Seventh Framework Programme

  Award: 610449