Jun 25 – 27, 2018
Stockholm, Alba Nova
Europe/Stockholm timezone

Energy-resolved ultrafast charge, spin and orbital dynamics in [Co/Pd] multilayers

Jun 25, 2018, 5:00 PM
2h
Board: 68
Contributed poster Poster session

Speaker

Loïc Le Guyader (European X-Ray Free-Electron Laser Facility GmbH)

Description

The ultrafast demagnetization is a fundamental problem of modern magnetism, with its microscopic origin remaining intensely debated. Particularly, the role played by the spin-orbit interaction in the moment dissipation to the lattice and that of the exchange interaction in the collapse of long-range order call for measurements capable of resolving the charge, spin and the orbital moment dynamics energy resolved.
Here we use soft X-ray Absorption Spectroscopy (XAS) with femtosecond X-ray produced by the Linac Coherent Light Source (LCLS) to probe charge and band structure dynamics around the Fermi energy E$_F$ in a [Co/Pd] magnetic multilayer. Comparing XAS changes at both L$_3$ and L$_2$ absorption edges below and above E$_F$ highlights the role played by the 3$d_{5/2}$ states. Using X-ray Magnetic Circular Dichroism (XMCD), we further discuss the spin and orbital moment dynamics with respect to the energy resolved charge dynamics.

Primary author

Loïc Le Guyader (European X-Ray Free-Electron Laser Facility GmbH)

Co-authors

Mr Daniel Higley (SLAC) Tianmin Liu (SLAC, Menlo Park, USA) Zhao Chen (SLAC, Menlo Park, USA) Tyler Chase (SLAC, Menlo Park, USA) Patrick Granitzka (SLAC, Menlo Park, USA) Dr Giacomo Coslovich (SLAC National Accelerator Laboratory) Dr Alberto Lutman (SLAC National Accelerator Laboratory, USA) Dr Georgi Dakovski (SLAC National Accelerator Laboratory) William Schlotter (SLAC) Padraic Schaffer (ALS, LBNL, Berkley, USA) Elke Arenholz (ALS, LBNL, Berkley, USA) Olav Hellwig (HGST, San Jose, USA) Stefano Bonetti (Stockholm university) Matteo Pancaldi (Stockholm University, Sweden) Mark Lalieu (TU Eindhoven, The Netherlands) Bert Koopmans (TU Eindhoven, The Netherlands) Joachim Stohr (Stanford University) Dr Alex Reid (SLAC) Prof. Hermann Durr (Uppsala University Dept. of Physics and Astronomy)

Presentation materials

There are no materials yet.