Magnetic Properties of Quantum Ferrimagnetic Spin Chains

TL;DR

This paper investigates the magnetic susceptibilities of quantum ferrimagnetic spin chains, revealing how their ferromagnetic and antiferromagnetic behaviors depend on the spin parameters and demonstrating their composite nature when S=2s.

Contribution

It provides a numerical analysis of magnetic susceptibilities in spin-$(S,s)$ ferrimagnetic chains and clarifies the relationship between their magnetic features and the spin parameters.

Findings

Ferrimagnetic chains exhibit combined ferromagnetic and antiferromagnetic features.

Behavior depends on the relation between S and s, especially when S=2s.

Chains behave like combinations of simpler spin chains under certain conditions.

Abstract

Magnetic susceptibilities of spin-$(S,s)$ ferrimagnetic Heisenberg chains are numerically investigated. It is argued how the ferromagnetic and antiferromagnetic features of quantum ferrimagnets are exhibited as functions of $(S,s)$. Spin-$(S,s)$ ferrimagnetic chains behave like combinations of spin-$(S-s)$ ferromagnetic and spin-$(2s)$ antiferromagnetic chains provided $S=2s$.