Quantum tunneling of two coupled single-molecular magnets

2002/11/30 by Jianming Hu, J. M. Hu, Zhide Chen +3
Materials Science · Physics and Astronomy · #Lanthanide and Transition Metal Complexes #Magnetism in coordination complexes #Organic and Molecular Conductors Research #cond-mat.mes-hall #cond-mat.mtrl-sci

paper · pdf · doi:10.1103/physrevb.68.104407

published as Phys. Rev. B 68, 104407 (2003) · 4 pages including 3 figure and 1 table

arxiv created 2002/11/30 · openalex publication_date 2003/09/08 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Two single-molecule magnets are coupled antiferromagnetically to form a supramolecule dimer. We study the coupling effect and tunneling process by means of the numerical exact diagonalization method, and apply them to the recently synthesized supramoleculer dimer [Mn₄]₂. A stray field is introduced to explain the tunneling splitting. Based on the Landau-Zener model the present theory is in qualitative agreement with the sweeping rate effect on the step height in the hysteresis loops.

Related

• Spin-Pair Tunneling in Mn₃ Single-Molecule Magnet
• Interference effect in the Landau-Zener tunneling of the antiferromagnetically coupled dimer of single-molecule magnets
• A Microscopic and Spectroscopic View of Quantum Tunneling of Magnetization
• Quantum Tunneling of Magnetization in Molecular Complexes with Large Spins. Effect of the Environment
• Quantum Tunneling of Magnetization in Lanthanide Single‐Molecule Magnets: Bis(phthalocyaninato)terbium and Bis(phthalocyaninato)dysprosium Anions