Quantum tunneling of two coupled single-molecular magnets

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 The model parameters are calculated for the dimer based on the tunneling process. The absence of tunneling at zero field and sweeping rate effect on the step height in the hysterisis loops are understood very well in this theory.

4 pages including 3 figure and 1 table

References in corpus (7)

• Quantum Computing in Molecular Magnets
• Suppression of tunneling by interference in half-integer--spin particles
• Destructive quantum interference in spin tunneling problems
• Spin-parity dependent tunneling of magnetization in single-molecule magnets
• Quantum computing of molecular magnet Mn${}_{12}$
• Proton Spin Relaxation Induced by Quantum Tunneling in Fe8 Molecular Nanomagnet
• Suppression of Quantum Phase Interference in Molecular Magnets Fe₈ with Dipolar-Dipolar Interaction

Cited by in corpus (3)

• Spin-bias driven magnetization reversal and nondestructive detection in a single molecular magnet
• Macroscopic quantum tunneling and quantum-classical phase transitions of the escape rate in large spin systems
• Quantum dynamics of exchange biased Single Molecule Magnets