Hot-Electron-Driven Enhancement of Spin-Lattice Coupling in Gd and Tb 4 f Ferromagnets Observed by Femtosecond X-Ray Magnetic Circular Dichroism
作者： Marko Wietstruk , Alexey Melnikov , Christian Stamm , Torsten Kachel , Niko Pontius
DOI: 10.1103/PHYSREVLETT.106.127401
关键词: Ferromagnetism 、 Magnetic moment 、 Magnetic circular dichroism 、 Excited state 、 Demagnetizing field 、 Electron 、 X-ray magnetic circular dichroism 、 Condensed matter physics 、 Materials science 、 Femtosecond
摘要: Femtosecond x-ray magnetic circular dichroism was used to study the time-dependent moment of $4f$ electrons in ferromagnets Gd and Tb, which are known for their different spin-lattice coupling. We observe a two-step demagnetization with an ultrafast time 750 fs identical both systems slower times differ sizeably 40 ps 8 Tb. conclude that coupling electronically excited state is enhanced up 50 compared equilibrium.
harvard.edu
arxiv.org
osti.gov
sci-hub.se 参考文章(30)
C. D. Stanciu, F. Hansteen, A. V. Kimel, A. Kirilyuk, A. Tsukamoto, A. Itoh, Th. Rasing, All-Optical Magnetic Recording with Circularly Polarized Light Physical Review Letters. ,vol. 99, pp. 047601- 047601 ,(2007) , 10.1103/PHYSREVLETT.99.047601
Jean-Yves Bigot, Mircea Vomir, Eric Beaurepaire, Coherent ultrafast magnetism induced by femtosecond laser pulses Nature Physics. ,vol. 5, pp. 515- 520 ,(2009) , 10.1038/NPHYS1285
G. P. Zhang, W. Hübner, Georgios Lefkidis, Yihua Bai, Thomas F. George, Paradigm of the time-resolved magneto-optical Kerr effect for femtosecond magnetism Nature Physics. ,vol. 5, pp. 499- 502 ,(2009) , 10.1038/NPHYS1315
M. Battiato, K. Carva, P. M. Oppeneer, Superdiffusive Spin Transport as a Mechanism of Ultrafast Demagnetization Physical Review Letters. ,vol. 105, pp. 027203- 027203 ,(2010) , 10.1103/PHYSREVLETT.105.027203
Rudolf Koopmann, Karolina Cupelli, Lars Redecke, Karol Nass, Daniel P DePonte, Thomas A White, Francesco Stellato, Dirk Rehders, Mengning Liang, Jakob Andreasson, Andrew Aquila, Sasa Bajt, Miriam Barthelmess, Anton Barty, Michael J Bogan, Christoph Bostedt, Sébastien Boutet, John D Bozek, Carl Caleman, Nicola Coppola, Jan Davidsson, R Bruce Doak, Tomas Ekeberg, Sascha W Epp, Benjamin Erk, Holger Fleckenstein, Lutz Foucar, Heinz Graafsma, Lars Gumprecht, Janos Hajdu, Christina Y Hampton, Andreas Hartmann, Robert Hartmann, Günter Hauser, Helmut Hirsemann, Peter Holl, Mark S Hunter, Stephan Kassemeyer, Richard A Kirian, Lukas Lomb, Filipe R N C Maia, Nils Kimmel, Andrew V Martin, Marc Messerschmidt, Christian Reich, Daniel Rolles, Benedikt Rudek, Artem Rudenko, Ilme Schlichting, Joachim Schulz, M Marvin Seibert, Robert L Shoeman, Raymond G Sierra, Heike Soltau, Stephan Stern, Lothar Strüder, Nicusor Timneanu, Joachim Ullrich, Xiaoyu Wang, Georg Weidenspointner, Uwe Weierstall, Garth J Williams, Cornelia B Wunderer, Petra Fromme, John C H Spence, Thilo Stehle, Henry N Chapman, Christian Betzel, Michael Duszenko, In vivo protein crystallization opens new routes in structural biology Nature Methods. ,vol. 9, pp. 259- 262 ,(2012) , 10.1038/NMETH.1859
Ganping Ju, Julius Hohlfeld, Bastiaan Bergman, René J. M. van de Veerdonk, Oleg N. Mryasov, Jai-Young Kim, Xiaowei Wu, Dieter Weller, Bert Koopmans, Ultrafast generation of ferromagnetic order via a laser-induced phase transformation in FeRh thin films. Physical Review Letters. ,vol. 93, pp. 197403- ,(2004) , 10.1103/PHYSREVLETT.93.197403
Jan-Ulrich Thiele, Matthias Buess, Christian H. Back, Spin dynamics of the antiferromagnetic-to-ferromagnetic phase transition in FeRh on a sub-picosecond time scale Applied Physics Letters. ,vol. 85, pp. 2857- 2859 ,(2004) , 10.1063/1.1799244
T. Ogasawara, K. Ohgushi, Y. Tomioka, K. S. Takahashi, H. Okamoto, M. Kawasaki, Y. Tokura, General features of photoinduced spin dynamics in ferromagnetic and ferrimagnetic compounds Physical Review Letters. ,vol. 94, pp. 087202- ,(2005) , 10.1103/PHYSREVLETT.94.087202
J. Walowski, G. Müller, M. Djordjevic, M. Münzenberg, M. Kläui, C. A. F. Vaz, J. A. C. Bland, Energy Equilibration Processes of Electrons, Magnons, and Phonons at the Femtosecond Time Scale Physical Review Letters. ,vol. 101, pp. 237401- ,(2008) , 10.1103/PHYSREVLETT.101.237401
G. Malinowski, F. Dalla Longa, J. H. H. Rietjens, P. V. Paluskar, R. Huijink, H. J. M. Swagten, B. Koopmans, Control of speed and efficiency of ultrafast demagnetization by direct transfer of spin angular momentum Nature Physics. ,vol. 4, pp. 855- 858 ,(2008) , 10.1038/NPHYS1092