Seifert, T. and Martens, U. and Guenther, S. and Schoen, M. A. W. and Radu, F. and Chen, X. Z. and Lucas, I. and Ramos, R. and Aguirre, M. H. and Algarabel, P. A. and Anadon, A. and Koerner, H. S. and Walowski, J. and Back, C. and Ibarra, M. R. and Morellon, L. and Saitoh, E. and Wolf, M. and Song, C. and Uchida, K. and Muenzenberg, M. and Radu, I. and Kampfrath, T. (2017) Terahertz Spin Currents and Inverse Spin Hall Effect in Thin-Film Heterostructures Containing Complex Magnetic Compounds. SPIN, 7 (3): 1740010. ISSN 2010-3247, 2010-3255
Full text not available from this repository.Abstract
Terahertz emission spectroscopy (TES) of ultrathin multilayers of magnetic and heavy metals has recently attracted much interest. This method not only provides fundamental insights into photoinduced spin transport and spin-orbit interaction at highest frequencies, but has also paved the way for applications such as efficient and ultrabroadband emitters of terahertz (THz) electromagnetic radiation. So far, predominantly standard ferromagnetic materials have been exploited. Here, by introducing a suitable figure of merit, we systematically compare the strength of THz emission from X/Pt bilayers with X being a complex ferro-, ferri- and antiferromagnetic metal, that is, dysprosium cobalt (DyCo5), gadolinium iron (Gd24Fe76), magnetite (Fe3O4) and iron rhodium (FeRh). We find that the performance in terms of spin-current generation not only depends on the spin polarization of the magnet's conduction electrons, but also on the specific interface conditions, thereby suggesting TES to be a highly interface-sensitive technique. In general, our results are relevant for all applications that rely on the optical generation of ultrafast spin currents in spintronic metallic multilayers.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TIME-DOMAIN SPECTROSCOPY; TEMPERATURE; TRANSITION; PHASE; FERH; EMITTERS; DYNAMICS; Terahertz spintronics; femtomagnetism; spin Hall effect; spin Seebeck effect; heterostructures |
| 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: | 14 Dec 2018 13:15 |
| Last Modified: | 20 Feb 2019 10:30 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1204 |
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