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Condensed Matter > Mesoscale and Nanoscale Physics

arXiv:0810.0616 (cond-mat)
[Submitted on 3 Oct 2008]

Title:Influence of antisymmetric exchange interaction on quantum tunneling of magnetization in a dimeric molecular magnet Mn6

Authors:S. Bahr, C.J. Milios, L.F. Jones, E.K. Brechin, V. Mosser, W. Wernsdorfer
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Abstract: We present magnetization measurements on the single molecule magnet Mn6, 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 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 tunneling processes between spin states belonging to different spin multiplets.
Comments: 5 pages, 4 figures
Subjects: Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Materials Science (cond-mat.mtrl-sci)
Cite as: arXiv:0810.0616 [cond-mat.mes-hall]
  (or arXiv:0810.0616v1 [cond-mat.mes-hall] for this version)
  https://doi.org/10.48550/arXiv.0810.0616
Journal reference: Phys. Rev. B 78, 132401 (2008)
Related DOI: https://doi.org/10.1103/PhysRevB.78.132401

Submission history

From: Stefan Bahr [view email]
[v1] Fri, 3 Oct 2008 11:34:19 UTC (713 KB)
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