Dresden 2009 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 3: Correlated Electrons: Spin Systems and Itinerant Magnets 1

TT 3.10: Vortrag

Montag, 23. März 2009, 12:45–13:00, HSZ 304

Magnetic, electronic, and structural properties of the filled skutterudite EuFe₄As₁₂ — •Andreas Leithe-Jasper¹, Walter Schnelle¹, Helge Rosner¹, Yuri Prots¹, Yuri Grin¹, Walter Steiner², and Michael Reissner² — ¹Max-Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany — ²TU Wien, Institut für Experimentalphysik, Wiedner Hauptstraße 8–10, 1040 Wien, Austria

The europium iron arsenide EuFe₄As₁₂ with filled skutterudite structure has been synthesized and its structural, electronic, magnetic and thermodynamic properties have been investigated. The Fe and Eu moments order ferrimagnetically at T_C = 151 K, the highest magnetic ordering temperature among filled skutterudite compounds. LDA band structure calculations confirm the observed magnetic polarizations and suggest that conduction electrons in EuFe₄As₁₂ have a large spin polarization, albeit lower than in isostructural EuFe₄Sb₁₂.