X Ray Magnetic Circular Dichroism (XMCD) and some contributions to Condensed Matter Magnetism
Juan Bartolome (University of Zaragoza, Spain)
Synchrotron based X-ray Magnetic Circular Dichroism is a measurement technique that has created a breakthrough in Magnetism. It is element sensitive, resolves spin and orbital magnetic moments, it is extremely sensitive, allowing to study very small samples, and combined with varying temperature and applied magnetic field allows to enter into the realm of Magnetic Phase transitions in solids, Nanomagnetism, Molecular Magnetism, Imaging or Time Resolution experiments.
In this talk we shall introduce the constituent devices in a 3rd generation synchrotron, the XMCD technique, the sum rules for data analysis, and some relevant general concepts.
Thereafter, some selected examples comprising Permanente Magnets, Nanomagnetic materials, such as Co nanoparticles capped with noble metals, Au nanoparticles and Pt clusters. As a third group we deal with Molecular magnets, as FeLa butterfly molecules, phthalocyanine thin films and molecular Cr wheels deposited on a substrate.