Regensburg 2013 – scientific programme
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MA: Fachverband Magnetismus
MA 28: Magnetic Materials
MA 28.2: Talk
Wednesday, March 13, 2013, 15:15–15:30, H22
Magnetism and structural instability in frustrated intermetallic AFe4X2 systems — •Inga Kraft, Christoph Bergmann, Katharina Weber, Nandang Mufti, Christoph Geibel, and Helge Rosner — Max Planck Institute for Chemical Physics of Solids, Dresden
Frustration in intermetallic systems lead to an increase of quantum fluctuations and often result in unusual properties. Magnetic, thermodynamic, and structural data of the intermetallic AFe4X2 compounds (A=Sc,Y,Lu,Zr; X=Si,Ge) evidence that these compounds cover the whole regime from frustrated AFM order up to an AFM quantum critical point. In agreement with the experimental findings our DFT calculations yield an orthorhombic ground state and together with magnetic order a strong interplay of structure and magnetism. We discuss the influence of the A and X site atoms on the strength of magnetic interactions and the size of structural distortion.