Magnetization Process of Single Molecule Magnets at Low Temperatures
arXiv:cond-mat/0309384 · doi:10.1103/PhysRevLett.91.047202
Abstract
We show that correlations established before quenching to very low temperatures, later drive the magnetization process of systems of single molecule magnets, after a magnetic field is applied at t=0. We also show that in SC lattices, m \propto sqrt(t), as observed in Fe_8, but only for 1+2*log_10(h_d/h_w) time decades, where h_d is a nearest neighbor dipolar magnetic field and a spin reversal can occur only if the field on it is within (-h_w,h_w). However, the sqrt(t) behavior is not universal. For BCC and FCC lattices, m \propto t^p, but p \simeq 0.7. The value to which m finally levels off is also given.
5 LaTeX pages, 2 figures. Submitted to Phys. Rev. Lett. on 26 January 2003, accepted on 24 July 2003
References in corpus (9)
- Theory of the spin bath
- Low-Temperature Quantum Relaxation in a System of Magnetic Nanomolecules
- Observation of the distribution of molecular spin states by resonant quantum tunneling of the magnetization
- Nuclear spin driven resonant tunnelling of magnetisation in Mn12 acetate
- Crossover between Thermally Assisted and Pure Quantum Tunneling in Molecular Magnet Mn12-Acetate
- Dislocation-induced spin tunneling in Mn-12 acetate
- Long-range ferromagnetic dipolar ordering of high-spin molecular clusters
- Dipolar interaction and incoherent quantum tunneling: a Monte Carlo study of magnetic relaxation
- Answer to the comment of Chudnovsky: On the square-root time relaxation in molecular nanomagnets
Cited by in corpus (23)
- Magnetothermal properties of molecule-based materials
- Electronic Transport in Single-Molecule Magnets on Metallic Surfaces
- Spin quantum tunneling via entangled states in a dimer of exchange coupled single-molecule magnets
- Magnetic long-range order induced by quantum relaxation in single-molecule magnets
- Landau-Zener tunneling in the presence of weak intermolecular interactions in a crystal of Mn4 single-molecule magnets
- Spin-lattice relaxation of magnetic centers in molecular crystals at low temperature
- Many-body Landau-Zener effect at fast sweep
- Quantum dynamics of a nanomagnet in a rotating field
- Giant isotope effect in the incoherent tunneling specific heat of the molecular nanomagnet Fe8
- Self-organized patterns of macroscopic quantum tunneling in molecular magnets
- Incoherent Landau-Zener-Stuckelberg Transitions in Single-Molecule Magnets
- How systems of single-molecule magnets magnetize at low temperatures
- Effect of dipolar interactions on the magnetization of a cubic array of nanomagnets
- Comment on "Magnetization Process of Single Molecule Magnets at Low Temperatures"
- Fronts of spin tunneling in molecular magnets
- Low-Temperature Magnetization Relaxation in Magnetic Molecular Solids
- Time relaxation of interacting single--molecule magnets
- Comment on "Hole digging in ensembles of tunneling molecular magnets"
- Dipolar-controlled spin tunneling and relaxation in molecular magnets
- Dynamics of large anisotropic spin in a sub-ohmic dissipative environment close to a quantum-phase transition
- Low-Temperature Magnetization Dynamics of Magnetic Molecular Solids in a Swept Field
- Magnetic Tunnel Window's Imprint and Beyond
- Reply to Comment on "Magnetization Process of Single Molecule Magnets at Low Temperatures"