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Ultrafast demagnetization of Co25Ni75/Pt multilayers with perpendicular anisotropy at elevated temperatures.
- Source :
-
Journal of Applied Physics . 5/15/2005, Vol. 97 Issue 10, p10A705-1-10A705-3. 3p. 4 Graphs. - Publication Year :
- 2005
-
Abstract
- Ultrafast demagnetization has been studied in Si/Pt(160 Å)/[Co25Ni75(x)/Pt(8 Å)]20 (x=3, 4.5, and 6 Å) multilayers with perpendicular anisotropy by magneto-optical pump-probe measurements in the polar geometry. Time-resolved measurements made in the saturated state showed that maximum demagnetization was achieved within 300 fs. Hysteresis loops were measured at a time delay of 1.3 ps for temperatures from 20 to 300 °C. The Curie temperature was found to increase from 150 to 250 °C with increasing Co25Ni75 thickness. By comparing the loops obtained with and without pump excitation, the increase in electron temperature due to the pump was estimated to be about 60 K. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 97
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 100454970
- Full Text :
- https://doi.org/10.1063/1.1847991