Berlin 2012 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 45: Correlated Electrons: Poster Session
TT 45.85: Poster
Donnerstag, 29. März 2012, 15:00–19:00, Poster B
Interplay of structural and electronic properties in itinerant AFe4X2 systems — •Til Goltz1, Nandang Mufti2, Christoph Geibel2, Theo Woike3, Hubertus Luetkens4, Johannes Spehling1, and Hans-Henning Klauss1 — 1Institute of Solid State Physics, TU Dresden, Germany — 2MPI for Chemical Physics of Solids, Dresden, Germany — 3Institute of Structural Physics, TU Dresden, Germany — 4Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institut, Villigen, Switzerland
The AFe4X2 (A=Y, Lu, Zr; X=Ge, Si) family of transition metal tetrels has shown to be a promising candidate for studying the change of the electronic ground state under chemical substitution [1]. Within the ZrFe4Si2-type structure (P42/mnm), the iron atoms are arranged in chains of edge-linked tetrahedra [2]. Their structure is prone for reduced dimensionality or frustration and is thus expected to lead to emergent phenomena near a quantum critical point. Since neutron scattering data on YFe4Ge2 show a simultaneous structural and magnetic transition [3], electronic and structural properties seem intimately connected within the whole AFe4X2 family. On the poster, we discuss the electronic and structural properties, extracted from our µSR, Mössbauer, X-Ray and thermodynamic data in the context of a structural driven magnetic phase transition.
N. Mufti, T.G. et al., DPG Spring Meeting 2011 (TT 49.11)
O.Ya. Oleksyn et al., Proc. 10th Int. Conf. Solid Compounds of Transition Elements, Münster, 1991
P. Schobinger-Papamentellos et al., JMMM 236 (2001) 14-17