Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1798326 | Journal of Magnetism and Magnetic Materials | 2016 | 5 Pages |
Abstract
Hysteresis and magnetic relaxation curves were performed on double well potential systems with quantum tunneling possibility via stochastic simulations. Simulation results are compared with experimental ones using the Mn12 single-molecule magnet, allowing us to introduce time dependence in the model. Despite being a simple simulation model, it adequately reproduces the phenomenology of a thermally activated quantum tunneling and can be extended to other systems with different parameters. Assuming competition between the reversal modes, thermal (over) and tunneling (across) the anisotropy barrier, a separation of classical and quantum contributions to relaxation time can be obtained.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
R. López-Ruiz, P.T. Almeida, M.G.F. Vaz, M.A. Novak, F. Béron, K.R. Pirota,