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Applied Physics Letters / Volume 99 / Issue 25 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 99, 252505 (2011); http://dx.doi.org/10.1063/1.3670305 (3 pages)

Observations of laser induced magnetization dynamics in Co/Pd multilayers with coherent x-ray scattering

B. Wu1, D. Zhu2, Y. Acremann3, T. A. Miller4, A. M. Lindenberg2,4, O. Hellwig5, J. Stöhr2, and A. Scherz2

1Department of Applied Physics, Stanford University, Stanford, California 94035, USA
2SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
3Laboratorium f. Festkörperphysik, ETH Zürich, 8093 Zürich, Switzerland
4Department of Material Science and Engineering, Stanford University, Stanford, California 94035, USA
5San Jose Research Center, Hitachi Global Storage Technologies, San Jose, California 95120, USA

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(Received 10 October 2011; accepted 24 November 2011; published online 22 December 2011)

We report on time-resolved coherent x-ray scattering experiments of laser induced magnetization dynamics in Co/Pd multilayers with a high repetition rate optical pump x-ray probe setup. Starting from a multi-domain ground state, the magnetization is uniformly reduced after excitation by an intense 50 fs laser pulse. Using the normalized time correlation, we study the magnetization recovery on a picosecond timescale. The dynamic scattering intensity is separated into an elastic portion at length scales above 65 nm, which retains memory of the initial domain magnetization, and a fluctuating portion at smaller length scales corresponding to domain boundary motion during recovery.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

cobalt, ferromagnetic materials, ground states, laser beam effects, magnetic domains, magnetic multilayers, magneto-optical effects, palladium, time resolved spectra, X-ray scattering

PACS

  • 75.70.Cn

    Magnetic properties of interfaces (multilayers, superlattices, heterostructures)

  • 78.20.Ls

    Magneto-optical effects

  • 75.78.Fg

    Dynamics of domain structures

  • 75.60.Ch

    Domain walls and domain structure

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 78.70.Ck

    X-ray scattering

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3670305

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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    K. Vahaplar, A. M. Kalashnikova, A. V. Kimel, D. Hinzke, U. Nowak, R. Chantrell, A. Tsukamoto, A. Itoh, A. Kirilyuk, and Th. Rasing, Phys. Rev. Lett. 103, 117201 (2009).

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    M. S. Pierce, R. G. Moore, L. B. Sorensen, S. D. Kevan, O. Hellwig, E. E. Fullerton, and J. B. Kortright, Phys. Rev. Lett. 90, 175502 (2003).

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