DYNA (or "Dynamic x-ray reflectivity (off-or-on resonance regime for isotropic, anisotropic and magnetic multilayers) simulation program") is a simulation tool to analyze structural, magnetic and electronic profiles along the growth direction of ultrathin layers. It simulates conventional x-ray or optical reflectivity, resonant (or "anomalous") x-ray reflectivity, "orbital reflectometry", magnetic resonant x-ray reflectivity with applications to magnetic or anisotropic layers, in hard or soft matter.
Dyna is an on-going open-source project, that uses Matlab environment, the move to Python + Qt being in progress.
download current MATLAB version (3.17 March 20, 2019) simulation and refinement
Project developpers and code contributors::
Stéphane Grenier (Inst. Néel)
Jean-Marc Tonnerre (Inst. Néel)
Nicolas Jaouen (Synchrotron Soleil)
Emmanuelle Jal (Sorbonne Université, LCPMR)
Marta Elzo (PhD, Inst. Néel & Soleil, 2009-2012)
Ingrid Hallsteinsen - Padraic Shaffer’s group - Berkeley Nat. Lab.
Resonant effects include
- magnetic-sensitive susceptibility, arbitrary magnetic moment direction described by Euler angles, with the limitation of neglictible spin-orbit coupling in the valence states
- anisotropic susceptibility, in the limitation of an uniaxial symmetry along the depth of the film, for the simulation of oriented molecules or orbitally ordered films.
Formalisms
- Parratt
- Boundary-Propagation matrix
Special Features
- Angular/Q scans
- Energy spectra at fix angle or fix Q
- Polarization Analysis, in and out
- Refinement in user-defined interval, with limits on parameters, and constrains between parameters
- Multifit: one system is refined by simultaneous simulations of various data (angle and energy scans, of any polarization, energy or angle configurations).
In case of use, please cite the reference paper:
M. Elzo, et al., Journal of Magnetism and Magnetic Materials, 324 (2), pp. 105-112 (2012)
http://dx.doi.org/10.1016/j.jmmm.20...
preprint

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Complementary expertise in fabrication, characterisation, and simulations for studies in nanomagnetism with applications in spin electronics and micro-systems

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Tables
Plots of the resonant magnetic and charge scattering factors
Dyna Download
Matlab and Python codes for Dyna, a program for the analysis of x-ray reflectivity.