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

2025/05/15 by N. Konstantinidis, Konstantinidis, N. P. · 1 citation
Materials Science · #FOS: Physical sciences #Magnetism in coordination complexes #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Strongly Correlated Electrons (cond-mat.str-el)

paper · pdf · doi:10.48550/arxiv.2505.09934

openalex publication_date 2025/05/15 · openalex created_date 2025/10/15 · openalex updated_date 2026/07/28

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.

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• Magnetic field-induced degenerate ground state in the classical antiferromagnetic XX model on the icosahedron

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