Magnetic long-range order induced by quantum relaxation in single-molecule magnets

Abstract

Can magnetic interactions between single-molecule magnets (SMMs) in a crystal establish long-range magnetic order at low temperatures deep in the quantum regime, where the only electron spin-fluctuations are due to incoherent magnetic quantum tunneling (MQT)? Put inversely: can MQT provide the temperature dependent fluctuations needed to destroy the ordered state above some finite Tc, although it should basically itself be a T-independent process? Our experiments on two novel Mn4 SMMs provide a positive answer to the above, showing at the same time that MQT in the SMMs has to involve spin-lattice coupling at a relaxation rate equaling that predicted and observed recently for nuclear spin-mediated quantum relaxation.

4 pages, 3 figures

References in corpus (11)

• Theory of the spin bath
• Suppression of tunneling by interference in half-integer--spin particles
• Low-Temperature Quantum Relaxation in a System of Magnetic Nanomolecules
• Destructive quantum interference in spin tunneling problems
• The effects of nuclear spins on the quantum relaxation of the magnetization for the molecular nanomagnet Fe_8
• Quantum Relaxation of Magnetisation in Magnetic Particles
• Ordering of dipolar Ising crystals
• Phonon-assisted tunneling in the quantum regime of Mn12-ac
• Long-range ferromagnetic dipolar ordering of high-spin molecular clusters
• Dipolar ordering in Fe8?
• Magnetization Process of Single Molecule Magnets at Low Temperatures

Cited by in corpus (21)

• Magnetothermal properties of molecule-based materials
• Spin-enhanced magnetocaloric effect in molecular nanomagnets
• Magnetic and magnetoelectric studies in pure and cation doped BiFeO3
• Landau-Zener tunneling in the presence of weak intermolecular interactions in a crystal of Mn4 single-molecule magnets
• Nuclear spin dynamics in the quantum regime of a single-molecule magnet
• Tunable dipolar magnetism in high-spin molecular clusters
• Long-range ferromagnetism of Mn12 acetate single-molecule magnets under a transverse magnetic field
• Magnetic dipolar ordering and relaxation in the high-spin molecular cluster compound Mn6
• Dipolar Ordering and Quantum Dynamics of Domain Walls in Mn-12 Acetate
• Giant isotope effect in the incoherent tunneling specific heat of the molecular nanomagnet Fe8
• Dynamics and thermalization of the nuclear spin bath in the single-molecule magnet Mn12-ac: test for the theory of spin tunneling
• Magneto-elastic waves in crystals of magnetic molecules
• Tunneling and inversion symmetry in single-molecule magnets: the case of the Mn12 wheel molecule
• Effect of dipolar interactions on the magnetization of a cubic array of nanomagnets
• Resonant quantum tunneling of spin chains in a three-dimensionnal magnetically ordered state
• Phases of anisotropic dipolar antiferromagnets
• Transverse Field Ising Ferromagnetism in Mn${}_{12}$-acetate-MeOH
• Dipolar-controlled spin tunneling and relaxation in molecular magnets
• Dipolar ordering in crystals of Mn12 Ac
• Spin Bath Decoherence Mediated by Phonons
• Quantum Fluctuations and Long-Range Order in Molecular Magnets