Dresden 2020 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 43: Frustrated Magnets - Strong Spin-Orbit Coupling 2 (joint session TT/MA)

TT 43.1: Vortrag

Mittwoch, 18. März 2020, 15:00–15:15, HSZ 304

Magnetic frustration in fcc lattices — •Veronika Fritsch1, Christina Baumeister1, F. Maximilian Wolf1, Johanna Oefele1, Jens-Uwe Hoffmann2, Manfred Reehuis2, and Oliver Stockert31EP 6, Electronic Correlations and Magnetism, Augsburg University, Germany — 2Helmholtz-Zentrum Berlin, Berlin, Germany — 3Max Planck Institute for Chemical Physics of Solids, Dresden, Germany

A face-centered cubic (fcc) lattice is inherently prone to magnetic frustration, since it is build from a network of edge-sharing tetrahedra. Up to now most studies were performed on insulating systems. We have investigated various metallic systems with neutron diffraction experiments, where the magnetic Ho-ions form an fcc lattice: HoInCu4 and HoCdCu4 [1] as well as HoInAg2 and HoInAu2. All compounds exhibit long-range magnetic order with different propagation vectors, which can be understood within a simple J1/J2 model [2]. Furthermore we found diffuse scattering dependent on the degree of frustration of the samples.
[1] V. Fritsch et al., arXiv:1907.09885 [cond-mat.str-el]
[2] P. W. Anderson, Phys. Rev. 79, 705 (1950).

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