First Demonstration of Magnetoelectric Coupling in a Polynuclear Molecular Nanomagnet: Single-Crystal EPR Studies of [Fe3 O(O2 CPh)6 (py)3 ]ClO4 ⋅py under Static Electric Fields.

Single-crystal EPR experiments show that the highly symmetric antiferromagnetic half-integer spin triangle [Fe3 O(O2 CPh)6 (py)3 ]ClO4 ⋅py (1, py=pyridine) possesses a ST =1/2 ground state exhibiting high g-anisotropy due to antisymmetric exchange (Dzyaloshinskii-Moriya) interactions. EPR experiments under static electric fields parallel to the triangle's plane (i.e., perpendicular to the magnetic z-axis) reveal that this ground state couples to externally applied electric fields. This magnetoelectric coupling causes an increase in the intensity of the intradoublet EPR transition and does not affect its resonance position when B0 ∥z. The results are discussed on the basis of theoretical models correlating the spin chirality of the ground state with the magnetoelectric effect.

• Publication year

  2018

• Venue

  Chemistry

• Publication date

  2018-09-27

• Fields of study

  Medicine, Physics, Chemistry

• Identifiers
  DOI 10.1002/chem.201803038PMID 30136321
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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