Magneto-thermal properties of the spin-s Heisenberg antiferromagnet on the cuboctahedron

TL;DR

This paper investigates the magneto-thermal behavior of a highly frustrated spin-s Heisenberg antiferromagnet on a cuboctahedron, revealing significant quantum effects even at large spin values.

Contribution

It provides detailed calculations of susceptibility, heat capacity, and cooling rate for various spin quantum numbers, highlighting deviations from classical predictions.

Findings

Large quantum deviations observed at high spins

Magnetic susceptibility shows non-classical behavior

Specific heat and cooling rate differ significantly from classical models

Abstract

We use the example of the cuboctahedron, a highly frustrated molecule with 12 sites, to study the approach to the classical limit. We compute magnetic susceptibility, specific heat, and magnetic cooling rate at high magnetic fields and low temperatures for different spin quantum numbers s. Remarkably big deviations of these quantities from their classical counterparts are observed even for values of s which are usually considered to be almost classical.