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29 March 2024
 
  » arxiv » 0902.4564

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Quantum Phase Interference and Neel-Vector Tunneling in Antiferromagnetic Molecular Wheels
O. Waldmann ; T. C. Stamatatos ; G. Christou ; H. U. Güdel ; I. Sheikin ; H. Mutka ;
Date 26 Feb 2009
AbstractThe antiferromagnetic molecular wheel Fe18 of eighteen exchange-coupled Fe(III) ions has been studied by measurements of the magnetic torque, the magnetization, and the inelastic neutron scattering spectra. The combined data show that the low-temperature magnetism of Fe18 is very accurately described by the Neel-vector tunneling (NVT) scenario, as unfolded by semiclassical theory. In addition, the magnetic torque as a function of applied field exhibits oscillations that reflect the oscillations in the NVT tunnel splitting with field due to quantum phase interference.
Source arXiv, 0902.4564
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