E-band excitations in the magnetic Keplerate molecule Fe30
O. Waldmann
TL;DR
This paper compares theoretical models of low-temperature magnetic excitations in the Fe30 molecule with experimental neutron scattering data, highlighting the strengths and limitations of each approach.
Contribution
It evaluates the effectiveness of linear spin-wave theory, modified linear SWT, and spin-level mean-field theory in describing Fe30's excitation spectrum.
Findings
SLMFT reproduces part of the experimental spectrum well
SWTs capture some E-band excitations but are incomplete
None of the models fully describe all experimental features
Abstract
The low-temperature excitations in the magnetic Keplerate molecule Fe30 as calculated by linear spin-wave theory (SWT), modified linear SWT, and spin-level mean-field theory (SLMFT) are compared to the recent inelastic neutron scattering results by Garlea et al. [Phys. Rev. B 73, 024414 (2006)]. SLMFT reproduces a part of the experimental spectrum rather well, but not all of it. SWTs yield a fraction of the E-band excitations and hence are not capable of a complete description of the excitation spectrum.
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