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TT: Fachverband Tiefe Temperaturen

TT 72: Poster Session: Correlated Electrons

TT 72.11: Poster

Mittwoch, 14. März 2018, 15:00–19:00, Poster B

Characterization of Hf and Sc substituted YbNi₄P₂ single crystals — •Paul Denck, Kristin Kliemt, and Cornelius Krellner — Institute of Physics, Goethe-University Frankfurt, D-60438 Frankfurt, Germany

The low lying Curie temperature, T_C = 0.17 K, of the heavy-fermion compound YbNi₄P₂ can be further suppressed by substituting P by As. The rare case of a ferromagnetic quantum critical point occurs in the substitution series YbNi₄(P_1−xAs_x)₂ at x ≈ 0.1 [1,2]. Single crystals Yb_1−xHf, Sc_xNi₄P₂, with various hafnium and scandium concentrations were grown by the Czochralski method [3,4]. We characterized the room temperature crystal structure by powder x-ray diffraction and determined the change in the lattice constants for increasing content of the subtituent. Furthermore, these crystals were characterized by electrical transport, heat capacity, and magnetization measurements to investigate the effect of the substitution on the ferromagnetic order.
C. Krellner et al., New J. Phys. 13, 103014 (2011)
A. Steppke et al., Science 339, 933 (2013)
K. Kliemt, C. Krellner, J. Cryst. Growth 449, 129 (2016)
K. Kliemt, C. Krellner, J. Phys.: Conf. Series 807, 032005 (2017)