Local variations of the magnetization effected by an external field in molecular rings

TL;DR

This paper investigates how external magnetic fields induce local variations and discontinuities in the ground-state magnetization of molecular antiferromagnetic rings, revealing complex behaviors influenced by molecular structure and parity effects.

Contribution

It demonstrates the presence of multiple magnetization discontinuities and parity-dependent jumps in molecular rings, highlighting novel local magnetization effects under external fields.

Findings

Magnetic field causes local magnetization variations and discontinuities.

Parity effects lead to different magnetization jumps in molecules.

All canting angles increase with the field in certain ranges.

Abstract

It is shown that an external magnetic field generates local variations of the classical ground-state magnetization in molecular rings of antiferromagnetic icosahedra with isotropic spin interactions. The magnetic response is characterized by a multitude of magnetization discontinuities occurring across the ring. In addition, a parity effect with respect to the number of icosahedra allows for magnetization jumps that occur at different field values for different molecules and produce an even more pronounced local variation of the magnetization. It is also found that for specific field ranges all canting angles of the molecular magnetizations increase with the field. These findings are in sharp contrast with the ones for rings of individual spins.