S-mixing and quantum tunneling of the magnetization in molecular nanomagnets

TL;DR

This paper investigates how S-mixing influences quantum tunneling in nanomagnets, revealing it significantly affects tunneling frequencies and explains discrepancies between different measurement methods.

Contribution

It demonstrates that S-mixing has a substantial impact on tunneling frequencies and resolves previous measurement discrepancies in Fe8 nanomagnets.

Findings

S-mixing greatly affects tunneling frequency

Discrepancies between spectroscopic and relaxation measurements are explained

S-mixing accounts for over 3 orders of magnitude difference

Abstract

The role of $S$-mixing in the quantum tunneling of the magnetization in nanomagnets has been investigated. We show that the effect on the tunneling frequency is huge and that the discrepancy (more than 3 orders of magnitude in the tunneling frequency) between spectroscopic and relaxation measurements in Fe$_8$ can be resolved if $S$-mixing is taken into account.