Transverse magnetization and transient oscillations in the quantum tunneling of molecular magnets

TL;DR

This paper investigates how a molecular magnet's transverse magnetization and transient oscillations, induced by a time-varying magnetic field, can reveal quantum tunneling phenomena and level repulsion effects.

Contribution

It introduces a method to observe quantum tunneling in molecular magnets through transverse oscillations, using an effective spin triangle model.

Findings

Transverse oscillations can indicate quantum tunneling.

Proposed method to probe level repulsion.

Model applied to V15 and Cu3 molecular magnets.

Abstract

We calculate the response of a molecular magnet subject to a time-varying magnetic field and coupled to a heat bath. We propose that observations of calculated oscillations transverse to the field direction may be an effective way of demonstrating quantum tunneling and thus probing the details of level repulsion. The effective model of a triangle of Heisenberg spins and weak anisotropies, as has been used to model the molecular magnets V15 and Cu3, is used to illustrate this.