Spin-Pair Tunneling in Mn₃ Single-Molecule Magnet

2014/11/02 by Yanrong Li, Li, Yan-Rong, Ruiting Liu +3
Materials Science · Physics and Astronomy · #FOS: Physical sciences #Magnetism in coordination complexes #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Organic and Molecular Conductors Research #Quantum and electron transport phenomena

paper · pdf · doi:10.48550/arxiv.1411.0199

openalex publication_date 2014/11/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We report spin-pair tunneling observed in Mn₃ single-molecule magnet, which is a crystal with 2D network of identical exchange coupling. We observed a series of extra quantum tunnelings by the ac susceptibility measurements, and demonstrated these are concerted tunnelings of two spins taking place from the same initial state to the same final state simultaneously. The resonant field of spin-pair tunneling can be expressed as H_z=lD/gμ₀μ_B+(n_\downarrow-n_\uparrow)JS/2gμ₀μ_B, and the splitting interval (|J|S/gμ₀μ_B) is half of that of the single-spin tunneling (2|J|S/gμ₀μ_B), which is analogous to the relationship between the magnetic flux quantum in superconductor (h/2e) and common metal (h/e).

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