Quantum tunnelling of magnetization in the single-molecule magnet Mn-6

Stefan Bahr, Constantinos J. Milios, Leigh F. Jones, Euan K. Brechin, Vincent Mosser, Wolfgang Wernsdorfer

Research output: Contribution to journalArticlepeer-review

Abstract

We present magnetization measurements of the single-molecule magnet Mn-6 revealing various tunnel transitions inconsistent with a giant spin description. We propose a dimeric model of the molecule with two coupled spins S = 6, which involves crystal. field anisotropy, symmetric Heisenberg exchange interaction and an antisymmetric Dzyaloshinskii-Moriya exchange interaction. We show that this simplified model of the molecule explains the experimentally observed tunnel transitions and that the antisymmetric exchange interaction between the spins gives rise to tunnelling processes between spin states belonging to different spin multiplets.

Original languageEnglish
Pages (from-to)1231-1236
Number of pages6
JournalNew journal of chemistry
Volume33
Issue number6
DOIs
Publication statusPublished - 2009

Keywords

  • PHASE INTERFERENCE
  • NANOMAGNETS

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