Parts | Days | Selection | Search | Updates | Downloads | Help
MA: Fachverband Magnetismus
MA 6: Molecular Magnetism
MA 6.5: Talk
Monday, March 18, 2024, 10:45–11:00, EB 301
Room Temperature Ferromagnetism in Tb3N@C80 Crystals — •Lebin Yu1, Shangfeng Yang2, and Thomas Greber1 — 1Physik-Institut, University of Zürich, Zürich, Switzerland — 2Department of Material Science and Engineering, University of Science and Technology of China, Hefei, China
Endohedral metallofullerenes (EMFs) with paramagnetic ions such as Dy3+ or Tb3+ provide a unique platform to study a spin system. Typically, magnetic interactions between neighboring carbon cages are neglected in the explanation of magnetic order above 3 K [1]. Unexpectedly, we have observed ferromagnetism at room temperature in cubic crystals of trinuclear nitrogen molecules using SQUID magnetometry. Dissolving the crystals in toluene reduces the remanence. For the dissolved Tb3N@C80 single molecule magnets we find hysteresis at 1.8 K without remanence, which reflects the frustrated ground state like in Dy3N@C80 [2]. Such a manifestation of magnetism implies a new aspect of magnetic properties of endofullerene single molecule magnets.
[1] A. Kostanyan et al. Phys. Rev. B, 101, 134429 (2020).
[2] R. Westerström et al. Phys. Rev. B, 89, 060406(R) (2014).
Keywords: endohedral fullerenes; single molecule magnets; molecular ferromagnetism; SQUID magnetometry