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Ultrafast hot-electron induced quenching of Tb4f magnetic order
- Source :
- Phys. Rev. B 96, 144427 (2017)
- Publication Year :
- 2017
-
Abstract
- We have investigated ultrafast quenching of the Tb4f magnetic order in Co74Tb26 alloys, induced by femtosecond hot-electrons pulses. The hot-electron pulses were produced in specific non-magnetic capping layers by infrared fs laser pulses. Our experimental results show that sub-picosecond dynamics of Tb4f magnetic moments can be induced by non-thermal and thermal hot-electrons. We further demonstrate that the demagnetization efficiencies of non-thermal and thermal hot electrons are similar. However, the characteristic demagnetization times show values of 0.35 ps for non-thermal hot-electrons excitations and 1.2 ps for thermal hot-electrons excitations. We explain this temporal elongation by the propagation time of thermal hot-electrons through the 15 nm thick CoTb film.<br />Comment: 14 pages, 3 Figures and 1 Table
- Subjects :
- Condensed Matter - Materials Science
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. B 96, 144427 (2017)
- Publication Type :
- Report
- Accession number :
- edsarx.1708.08919
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevB.96.144427