- https://www.cells.es/en/media/events/alba-public-events/soft-x-ray-coherent-scattering-for-magnetic-studies-1
- Soft x-ray (coherent) scattering for magnetic studies
- 2018-04-18T12:00:00+02:00
- 2018-04-18T13:00:00+02:00
- Nicolas Jaouen, SEXTANTS beamline, Synchrotron SOLEIL, France
- What
- events
- When
- Apr 18, 2018 from 12:00 PM to 01:00 PM (Europe/Madrid / UTC200)
- Where
- Marie Curie Briefing Room
- Contact Name
- Inma Hernández
- Contact Phone
- 935924389
- Attendees
- NOTE: If you are interested in attending, please contact Inma Hernández with your Identity Card number and name to obtain the ALBA access.
- Web
- Visit external website
- Add event to calendar
- iCal
ABSTRACT
Many current forthcoming applications of magnetic materials involve heterostructures or alloys containing magnetic and non-magnetic elements. X-ray Resonant (Coherent) Scattering is the technique of choice to probe such phenomena thanks to its element-selectivity and spatial sensitivity.
In this presentation I will introduce the experimental set-up that we developed at SOLEIL and illustrate their capabilities. SEXTANTS [1] is a beamline of the SOLEIL synchrotron, covering the 50-1700eV energy range dedicated to soft x-ray scattering. The resolving power exceeds 104 and maximum flux on the sample ranges from 1×1014 (100 eV) to 2×1013 (1000 eV) ph./s/0.1% bw. The beamline main objective is the investigation of the electronic and magnetic properties of solids using three scattering techniques: resonant inelastic x-ray scattering (RIXS), x-ray resonant magnetic scattering (XRMS) and coherent x-ray scattering (CXS), the last one including also imaging via Fourier transform holography (FTH) [2].
In the second part, several recent results obtained at SEXTANTS beamline will be presented, and in particular I will show that XRMS is the tool to study magnetic chirality as illustrated with two systems: on one hand, Pt/Co multilayers in which Dzyaloshinskii-Morya interaction (DMI) is a induced by the inversion symmetry breaking at the Pt/Co interfaces [3,4] and on the other hand, an investigation we have done of BiFeO3 thin epitaxial layers [4,5] in which the “bulk” DMI plays a major role in its magnetic configuration and in particular in the stabilization of the antiferromagnetic cycloid.
In the last part I will present the latest development of resonant scattering and in particular how the use of the x-ray coherence available at modern light source allow nowadays to image the sample with a spatial resolution of few tens of nanometers and a time resolution ranging from ns down to fs timescale.
[1] M. Sacchi et al., Journal of Physics: Conference Series 425 (2013) 072018
[2] S. Eisebitt et al., Nature, 432, 885 (2004).
[3] J.Y. Chauleau, et al., Phys. Rev. Lett. 120, 037202 (2018).
[4] W. Legrand et al., submitted and https://arxiv.org/abs/1712.05978
[5] I. Gross et al., Nature 549, 252 (2017)
[6] J.Y Chauleau et al., in preparation