Single-Molecule Toroic Design through Magnetic Exchange Coupling

Hao Lan Zhang, Yuan Qi Zhai, Lei Qin, Liviu Ungur, Hiroyuki Nojiri, Yan Zhen Zheng

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


The big data era calls for larger capacity of our hard drive, which in turn depends on the number of magnetic units that store bits of 1 or 0. However, as the density of these units increases, flipping one unit without affecting another becomes more difficult because of undesired magnetic perturbations from the reading/writing heads. Single-molecule toroics (SMTs) that exploit vortex-like magnetic structures are insensitive to homogeneous magnetic fields and hence are promising for next-generation ultra-dense information storage. However, the synthesis of such molecular materials is challenging. Here, we show by using ferromagnetic interactions that this target can be realized in a 16-membered heterometallic cluster {Fe8Dy8}, which shows a stable 4-fold degenerated magnetic toroidal ground state at low temperatures. This is significantly distinguished from the most studied dipole-dipole interaction-based SMTs and demonstrates a promising strategy for the next generation of SMT design.

Original languageEnglish
Pages (from-to)1481-1493
Number of pages13
Issue number6
Publication statusPublished - 2020 Jun 3


  • MAP1: Discovery

ASJC Scopus subject areas

  • Materials Science(all)


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