Radu, I. and Woltersdorf, G. and Kiessling, M. and Melnikov, A. and Bovensiepen, U. and Thiele, J. -U. and Back, C. H. (2009) Laser-Induced Magnetization Dynamics of Lanthanide-Doped Permalloy Thin Films. PHYSICAL REVIEW LETTERS, 102 (11): 117201. ISSN 0031-9007, 1079-7114
Full text not available from this repository.Abstract
We investigate the effect of Ho, Dy, Tb, and Gd impurities on the femtosecond laser-induced magnetization dynamics of thin Permalloy films using the time-resolved magneto-optical Kerr effect. Varying the amount of Ho, Dy, Tb content from 0% to 8%, we observe a gradual change of the characteristic demagnetization time constant from approximate to 60 to approximate to 150 fs. In contrast, Gd concentrations up to 15% do not influence the time scale of the initial photoinduced magnetization loss. We propose a demagnetization mechanism that relies on strong magnetic inertia of the rare-earth dopant which stabilizes the ferrimagnetic ordering and thereby delays the demagnetization.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ULTRAFAST SPIN DYNAMICS; NICKEL; METALS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Sep 2020 07:10 |
| Last Modified: | 21 Sep 2020 07:10 |
| URI: | https://pred.uni-regensburg.de/id/eprint/29266 |
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