Longitudinal evolution of magnetization of ferromagnets following ultrafast demagnetization: Role of finite size and shape of demagnetized region
A dependence of a relaxation rate on the shape of the demagnetized region for a longitudinal evolution of total magnetization to its equilibrium value following the ultrafast demagnetization is demonstrated. This shape-dependence is caused by a motion of the wave front inside the demagnetized region...
| Published in: | Condensed Matter Physics |
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| Main Author: | |
| Format: | Article |
| Language: | English |
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Yukhnovskii Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine
2014-12-01
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| Online Access: | http://dx.doi.org/10.5488/CMP.17.44701 |
| Summary: | A dependence of a relaxation rate on the shape of the demagnetized region for a longitudinal evolution of total magnetization to its equilibrium value following the ultrafast demagnetization is demonstrated. This shape-dependence is caused by a motion of the wave front inside the demagnetized region. The contribution of the wave front for spherically symmetric shape of the demagnetized region is up to 3 times and for cylindrically symmetric shape up to 2 times stronger than for one dimensional demagnetized region. This effect can be observed after the demagnetization by a tightly focused femtosecond laser pulse. |
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| ISSN: | 1607-324X |