Exchange interactions and full magnetization process of multispin nanoclaster Mn4

TL;DR

This paper theoretically investigates the full magnetization process of the Mn4 nanocluster, deriving formulas for exchange constants and highlighting quantum jumps in megagauss fields, with exact diagonalization of the Hamiltonian.

Contribution

It provides a new theoretical framework for analyzing Mn4 nanoclusters, including formulas for exchange constants and the exact diagonalization approach for the spin Hamiltonian.

Findings

Quantum jumps occur in megagauss magnetic fields.

Formulas for exchange constants from experimental data are derived.

Exact diagonalization of the Hamiltonian enhances comparison with experiments.

Abstract

Full magnetization process of magnetic nanocluster Mn4, including all its actual multiplets, is theoretically investigated. The formulas needed to determine the exchange constants of cluster Mn4 from experimental data are obtained. It is shown that quantum jumps of magnetization of this nanocluster are in area of megagauss magnetic fields. Remarkable feature of considered nanocluster Mn4 differing it from other multispin molecules is that its exchange spin Hamiltonian supposes exact diagonalization. This provides a reliable basis for comparison of theoretical predictions with experimental data and is important for development of new experimental techniques of high-spin molecule research.