Spin-phonon avalanches in Mn-12 acetate
We report experimental studies and suggest a quantitative model of spin relaxation in Mn12 acetate in a pulsed magnetic field in the temperature range 1.95.0 K. When the field applied along the anisotropy axis is swept at 140 T/s through a nonmagnetized Mn12 acetate sample, the samples magnetization...
| Authors: | , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 1999 |
| Country: | España |
| Institution: | Universidad de Barcelona |
| Repository: | Dipòsit Digital de la UB |
| OAI Identifier: | oai:diposit.ub.edu:2445/10661 |
| Online Access: | https://hdl.handle.net/2445/10661 |
| Access Level: | Open access |
| Keyword: | Materials magnètics Relaxació magnètica Propietats magnètiques Spin (Física nuclear) Magnetic materials Magnetic relaxation Spin (Nuclear physics) Magnetic properties |
| Summary: | We report experimental studies and suggest a quantitative model of spin relaxation in Mn12 acetate in a pulsed magnetic field in the temperature range 1.95.0 K. When the field applied along the anisotropy axis is swept at 140 T/s through a nonmagnetized Mn12 acetate sample, the samples magnetization switches, within a few milliseconds, from zero to saturation at a well-defined field whose value depends on temperature but is quantized in units of 0.46 T. A quantitative explanation of the effect is given in terms of a spin-phonon avalanche combined with thermally assisted resonant spin tunneling. |
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