1. Instituto de Física Fundamental (AbinitSim Unit), CSIC, Serrano 123, 28006 Madrid, Spain
2. Departamento de Química Física, Facultad de Ciencias Químicas, Universidad de Salamanca, 37008 Salamanca, Spain
3. Laboratoire Modélisationet Simulation Multi Echelle, Université Paris-Est, MSME UMR 8208, CNRS, UPEC, UPEM, 5 Bd Descartes, Champs-sur-Marne, F-77454 Marne la Vallée, France
4. Laboratory of Nanotechnology and Magnetism, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
5. Graz University of Technology, Institute of Experimental Physics, Petersgasse 16, 8010 Graz, Austria