Quantum nucleation in a single-chain magnet
arXiv:cond-mat/0509309 · doi:10.1103/PhysRevLett.95.237203
Abstract
The field sweep rate (v=dH/dt) and temperature (T) dependence of the magnetization reversal of a single-chain magnet (SCM) is studied at low temperatures. As expected for a thermally activated process, the nucleation field (H_n) increases with decreasing T and increasing v. The set of H_n(T,v) data is analyzed with a model of thermally activated nucleation of magnetization reversal. Below 1 K, H_n becomes temperature independent but remains strongly sweep rate dependent. In this temperature range, the reversal of the magnetization is induced by a quantum nucleation of a domain wall that then propagates due to the applied field.
5 pages, 4 figures
References in corpus (7)
- Glauber dynamics in a single-chain magnet: From theory to real systems
- Finite-Size effects in "Single Chain Magnets": an experimental and theoretical study
- Fluctuations and Instabilities of Ferromagnetic Domain Wall pairs in an External Magnetic Field
- Macroscopic Quantum Tunneling of a Domain Wall in a Ferromagnetic Metal
- Determination of the magnetic anisotropy axes of single-molecule magnets
- Macroscopic Quantum Tunneling of Ferromagnetic Domain Walls
- Macroscopic Quantum Dynamics of a Free Domain Wall in a Ferromagnet
Cited by in corpus (12)
- Spin canting in a Dy-based Single-Chain Magnet with dominant next-nearest neighbor antiferromagnetic interactions
- Finite-size effects on the dynamic susceptibility of CoPhOMe single-chain molecular magnets in presence of a static magnetic field
- Field sweep rate dependence of the coercive field of single-molecule magnets: a classical approach with applications to the quantum regime
- Magnetic Tetrastability in a Spin Chain
- Tunneling and inversion symmetry in single-molecule magnets: the case of the Mn12 wheel molecule
- Subtle competition between ferromagnetic and antiferromagnetic order in a Mn(II) - free radical ferrimagnetic chain
- Monte Carlo simulated dynamical magnetization of single-chain magnets
- Resonant quantum tunneling of spin chains in a three-dimensionnal magnetically ordered state
- Instability of the ferromagnetic phase under random fields in an Ising spin glass with correlated disorder
- Ising spin glass in a random network with a gaussian random field
- Magnetism and effect of anisotropy with one dimensional monatomic chain of cobalt by a Monte Carlo simulation
- Quantum Spinodal Phenomena