Magnetic Anisotropy in the Molecular Complex V15
N. P. Konstantinidis (1), D. Coffey (2) ((1) Trinity College Dublin,, (2) State University of New York at Buffalo)
TL;DR
This paper uses perturbation theory to analyze magnetic anisotropy in the V15 molecule, explaining magnetization transition rounding, estimating DM interaction, and elucidating hysteresis in magnetization.
Contribution
It introduces a model incorporating Dzyaloshinskii-Moriya interaction to explain experimental magnetization phenomena in V15.
Findings
Energy differences match experimental data
Estimated DM interaction strength
Provided explanation for hysteresis behavior
Abstract
We apply degenerate perturbation theory to investigate the effects of magnetic anisotropy in the magnetic molecule V15. Magnetic anisotropy is introduced via Dzyaloshinskii-Moriya (DM) interaction in the full Hilbert space of the system. Our model provides an explanation for the rounding of transitions in the magnetization as a function of applied field at low temperature, from which an estimate for the DM interaction is found. We find that the calculated energy differences of the lowest energy states are consistent with the available data. Our model also offers a novel explanation for the hysteretic nature of the time-dependent magnetization data.
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