Regensburg 2019 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 53: Frustrated Magnets - Strong Spin-Orbit Coupling (joint session TT/MA)
TT 53.9: Talk
Thursday, April 4, 2019, 11:45–12:00, Theater
Magnetic Frustration in Cd-substituted HoInCu4 — Maximilian Wolf1, Christina Baumeister1, Sebastian Bachus1, Jens-Uwe Hoffmann2, Oliver Stockert3, and •Veronika Fritsch1 — 1EP 6, Electronic Correlations and Magnetism, Augsburg University, Germany — 2Helmholtz-Zentrum Berlin, Berlin, Germany — 3Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
HoInCu4 is one of the rare examples of a partially frustrated magnetic metal [1,2], due to the Ho ions forming an fcc lattice, with alternating antiferromagnetic planes along [100], which are separated by frustrated planes. The substitution of In with Cd in HoInCu4 yields a breakdown of magnetic frustration, resulting for HoCdCu4 in a fully ordered magnetic structure of ferromagnetic planes, stacked antiferromagnetically along the [111] direction [3,4]. We have investigated the evolution of magnetic order and magnetic frustration in HoIn1−xCdxCu4 with thermodynamic and transport measurements at low temperatures. Our data indicate the presence of a bicritical point between the frustrated and the unfrustrated phase. Furthermore we present neutron-diffraction data on single crystals of HoInCu4 showing
enhanced diffuse scattering as a consequence of magnetic frustration.
V. Fritsch et al. PRB 71, 132401 (2005)
O. Stockert et al. unpublished
V. Fritsch et al. PRB 73, 094413 (2006)
O. Stockert et al., Experimental Report, MLZ Garching (2017)