1. Institute of PhysicsGoethe‐University FrankfurtMax‐von‐Laue‐Str. 160438Frankfurt am MainGermany
2. Experimental Physics VCenter for Electronic Correlations and MagnetismUniversity of Augsburg86135AugsburgGermany
3. Division of Materials ResearchNational Science FoundationArlingtonVirginia22230USA
4. Materials Science DivisionArgonne National LaboratoryArgonneIllinois60439USA