Tunable dipolar magnetism in high-spin molecular clusters

Abstract

We report on the Fe17 high-spin molecular cluster and show that this system is an exemplification of nanostructured dipolar magnetism. Each Fe17 molecule, with spin S=35/2 and axial anisotropy as small as D=-0.02K, is the magnetic unit that can be chemically arranged in different packing crystals whilst preserving both spin ground-state and anisotropy. For every configuration, molecular spins are correlated only by dipolar interactions. The ensuing interplay between dipolar energy and anisotropy gives rise to macroscopic behaviors ranging from superparamagnetism to long-range magnetic order at temperatures below 1K.

Replaced with version accepted for publication in Physical Review Letters

References in corpus (9)

• Spin-enhanced magnetocaloric effect in molecular nanomagnets
• Ordering of dipolar Ising crystals
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• Long-range ferromagnetism of Mn12 acetate single-molecule magnets under a transverse magnetic field
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Cited by in corpus (7)

• Monte Carlo study of the spin-glass phase of the site-diluted dipolar Ising model
• Micromagnetic simulations of interacting dipoles on a fcc lattice: Application to nanoparticle assemblies
• Experimental determination of the dipolar field in Mn12-acetate
• Subtle competition between ferromagnetic and antiferromagnetic order in a Mn(II) - free radical ferrimagnetic chain
• Transverse Field Ising Ferromagnetism in Mn${}_{12}$-acetate-MeOH
• Dipolar ordering in crystals of Mn12 Ac
• Quantum Fluctuations and Long-Range Order in Molecular Magnets