Resonant magnetic scattering with soft x-ray pulses from a free-electron laser operating at 1.59 nm

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C. Gutt,¹ L.-M. Stadler,¹ S. Streit-Nierobisch,¹ A. P. Mancuso,¹ A. Schropp,¹ B. Pfau,² C. M. Günther,² R. Könnecke,² J. Gulden,¹ B. Reime,¹ J. Feldhaus,¹ E. Weckert,¹ I. A. Vartanyants,¹ O. Hellwig,³ F. Staier,⁴ R. Barth,⁴ M. Grunze,⁴ A. Rosenhahn,⁴ D. Stickler,⁵ H. Stillrich,⁵ R. Frömter,⁵ H. P. Oepen,⁵ M. Martins,⁶ T. Nisius,⁷ T. Wilhein,⁷ B. Faatz,¹ N. Guerassimova,¹ K. Honkavaara,¹ V. Kocharyan,¹ R. Treusch,¹ E. Saldin,¹ S. Schreiber,¹ E. A. Schneidmiller,¹ M. V. Yurkov,¹ S. Eisebitt,² and G. Grübel¹
¹DESY, Notkestraße 85, 22607 Hamburg, Germany
²Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung m.b.H. (BESSY), Albert-Einstein-Straße 15, D-12489 Berlin, Germany
³Hitachi Global Storage Technology, 3403 Yerba Buena Road, San Jose, California 95135, USA
⁴Angewandte Physikalische Chemie, Universität Heidelberg, Im Neuenheimer Feld 253, D-69120 Heidelberg, Germany
⁵Institut für Angewandte Physik, Universität Hamburg, Jungiusstraße 11, D-20355 Hamburg, Germany
⁶Institut für Experimentalphysik, Universität Hamburg, Luruper Chaussee 149, D-22761 Hamburg, Germany
⁷Institute for X-ray-Optics, RheinAhr-Campus Remagen, FH Koblenz, Südallee 2, D-53424 Remagen, Germany

Received 14 July 2008; published 19 June 2009

Wereport on a resonant magnetic scattering experiment using soft x-raypulses generated from a free-electron laser (FEL). The free-electron laserwas operated at a fundamental wavelength of 7.97 nm andradiation at the fifth harmonic originating from self-amplified stimulated emissionat 1.59 nm with an average energy of 4 nJper pulse was detected. We demonstrate the feasibility of resonantmagnetic scattering at FEL sources by using a Co/Pd multilayeras prototype sample that was illuminated with 20-fs-long soft x-raypulses tuned to the Co L₃ absorption edge at 778.1 eV(1.59 nm).

URL:	http://link.aps.org/doi/10.1103/PhysRevB.79.212406
DOI:	10.1103/PhysRevB.79.212406
PACS:	78.70.Ck; 41.60.Cr; 75.70.-i 78.70.Ck X-ray scattering (condensed matter) 41.60.Cr Free-electron lasers 75.70.-i Magnetic properties of thin films, surfaces, and interfaces YEAR: 2009
KEYWORDS:	cobalt, free electron lasers, high-speed optical techniques, palladium, superradiance, X-ray scattering

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