Group type: Experimental

Research description:

Synchrotron based spectroscopic techniques (X-ray Absortion, X-ray magnetic Circular Dichroism, X-ray Magnetic resonant Scattering) have reached their maturity in the study of magnetic materials. Because of their element selectivity and improved resolution they allow obtaining direct information on the electronic state and the atomic orbital and spinning moments of the magnetogenic atoms. The advances in imaging, combining microscopy with XMCD, are giving a new impulse in the detailed understanding of static and, adding time as a parameter, in the dynamics of the magnetic domain formation and motion. Our group intends to go further in our studies of nanostructured systems of different dimensionality including imaging techniques as X-ray PhotoEmission Electro Microscopy (XPEEM) and combining these results with Magnetic Force Microscopy (MFM) images obtained in our laboratory and Scanning Tunnelling Microscopy (STM) measurements at the Laboratorio de Microscopías Avanzadas of the University of Zaragoza. Other techniques such as neutron diffraction, Small Angle Neutron Scattering (SANS), Extended X-ray Fine structure (EXAFS) and muon scattering, available in Facilities are also used.

New topics of hot actuality and risk are studied such as the search for magnetism in biologically suported non-magnetic particles, new magnetic phases, and spintronic systems based on the Tunnel Anisotropic Magnetoresistance (TAMR). Besides, some topics originated in previous projects, which are in a very productive status, are continued such as magnetism of supported sef-organized nanoparticles and single molecule magnets, nanostructured thin films and Griffiths phases. The in-house magnetic characterization is performed in our Low Temperature Laboratory, including Mössbauer and CEMS spectroscopy, and in the Service of Magnetic Measurements of the University of Zaragoza. We exploit our home-built high frequency transversal susceptibility probe built to study anisotropy field and dynamical switching directly at radio-frequencies of nanoparticles and Griffiths phases.



Keywords: Advanced microscopies and spectroscopiesMagnetism and SpintronicsPhase transitionsNanostructuresLow dimensional systems, Molecular Science, Surfaces and Interfaces

Affiliations: Instituto de Ciencia de Materiales de Aragón -Universidad de Zaragoza-CSIC- (ICMA);  Centro Universitario de la Defensa (CUD);  Escola Universitària Salesiana de Sarrià (EUSS);  Diamond Light Source;  University of Cambridge;  Istituto Officina dei Materiali (CNR-IOM)

Group Members: Ana Arauzo (ICMA) ; Laura Badía (ICMA); Juan Bartolomé (ICMA); Fernando Bartolomé (ICMA); Elena Bartolomé (EUSS); Irene Calvo (University of Cambridge); Celia Castán (CNR-IOM); Adriana I. Figueroa (Diamond Light Source); Luis M. García (ICMA); Julia Herrero-Albillos (CUD); Jorge Lobo (ICMA); Javier Rubín (ICMA); Mónica Torres García (ICMA); Jesús Yus Díez (ICMA)