X-Ray Spectroscopies.

Options TOULOUSE
Local Contact

Fabienne DUC - LNCMI
Olivier MATHON - ESRF
Field range 0 - 30 T
Temperature range 2 - 300 K
Sample size Single crystals: polished or thinned samples 100 μm < diameter < 500 μm,
thickness must be homogeneous (20 μm or less) adjusted to the probed edges, surfaces without roughness are preferred.
The samples are mounted with a defined orientation.
Typical experiment XAS and XMCD in transmission mode in high pulsed magnetic fields
Valence fluctuations (XAS)
Element-selective magnetometry (XMCD)
Sample Holder
Drawing of the sample mounting in the sample holder for XAS and XMCD in pulsed magnetic fields
Sample (drawn in green) is sandwiched between two nanopolycrystalline diamond (NPD) windows (Ø 2 mm, 100 μm thickness, drawn in blue), themselves mounted into a cylindrical plastic holder (Ø 9 mm) and maintained by a small plastic cap (Ø 2 mm).
Sample is glued with wax on one of the NPD window.
Sample evironment Sample in He gas. Cooling by forced convection, dynamic flow.
Gaseous helium from 300K down to 2K
Examples 1. High field XMCD in multiferroic compound - Phys. Rev. B 102, 094408 (2020)
2. Description of acquisition scheme - JSR 18, 224 (2011)
3. XAS and XMCD in pulsed magnetic field on ID24 - JSR, 14, 409 (2007)
Proposal submission via ESRF website
Apply OnLine
Before writing a proposal, it is mandatory to contact well in advance both local contacts to evaluate the feasibility of the experiment.

Two proposal review rounds are held each year, with deadlines for submission of applications for beam time on:
1st March (inclusive) for the scheduling period August (of the same year) to February (of the following year)
10th September (inclusive) for the scheduling period March to July (of the following year)
Review Committees: The proposals submitted for 1st March and 10th September proposal rounds are reviewed during the Review Committees which are held in April and October, respectively.

ESRF long shutdown in 2019

Due to the long shutdown for EBS (Extremely Brilliant Source) project, the ESRF machine will stop on 10th December 2018 at 8:00 am for more than one year. There will be no proposal submission deadline in September 2018.
local contact: F. duc, O. Mathon