Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 5: Frustrated Magnets - General 1 (joint session TT/MA)

TT 5.4: Vortrag

Montag, 16. März 2020, 10:15–10:30, HSZ 304

Crystal growth and characterization of ZrFe₄Si₂ — •Katharina M. Zoch, Isabel Reiser, Alexander Bodach, Kristin Kliemt, and Cornelius Krellner — Physikalisches Institut, Goethe Universitaet Frankfurt, 60438 Frankfurt, Germany

The crystal structure of ZrFe₄Si₂ consists of edge-linked Fe-tetrahedra along the crystallographic c-direction. This type of arrangement is prone to show frustration and low dimensional fluctuations. First results indicate that ZrFe₄Si₂ displays some sort of weak magnetic order at unusual low temperatures for a Fe-based compound, as well as deviant behavior in specific heat and resistivity measurements [1]. To further investigate these features, we are in need of good quality single crystals. The crystal growth is a challenging subject since the compound is strongly peritectic melting and its melted elements are reactive with common crucible materials under crystal growth conditions. We show first results of the crystal growth from a levitating melt using the Czochralski method. Furthermore, we present the characterization of the obtained samples especially near the suspected magnetic order.

[1] K. Weber: Intermetallic 3d systems close to a magnetic instability: new unusual cases, Dissertation TU Dresden (2017)