Berlin 2018 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 72: Poster Session: Correlated Electrons
TT 72.4: Poster
Mittwoch, 14. März 2018, 15:00–19:00, Poster B
Evolution of magnetic order in HoIn1−xCdxCu4 — Christina Baumeister1, Oliver Stockert2, and •Veronika Fritsch1 — 1EP 6, Electronic Correlations and Magnetism, Augsburg University, Germany — 2Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
HoInCu4 is a partially frustrated metal, crystallizing in the cubic AuBe5 structure. The Ho ions carrying the magnetic moment form a fcc lattice, with alternating antiferromagnetic planes along [100], which are separated by frustrated planes as shown by neutron scattering experiments [1]. The partial frustration is manifested in magnetization and specific heat data, leading to a frustration parameter f = 14.3 [2]. In contrast, no signatures of magnetic frustration are found in isotructural HoCdCu4 [3]. Here, Neutron scattering experiments point to a magnetic structure of ferromagnetic planes, which are stacked antiferromagnetically along the [111] direction [4].
We will present detailed measurements of magnetization and specific heat on the alloying series HoIn1−xCdxCu4 tracking the evolution of the magnetic order and the magnetic frustration as function of Cd content.
[1] O. Stockert et al., Experimental Report, HMI B 612 (2006).
[2] V. Fritsch et al., Phys. Rev. B, 71, 132401 (2005).
[3] V. Fritsch et al., Phys. Rev. B, 73, 094413 (2006).
[4] O. Stockert et al., Experimental Report, MLZ Garching (2017).