SKM 2023 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 10: Correlated Electrons: Other Materials
TT 10.5: Talk
Monday, March 27, 2023, 16:00–16:15, HSZ 204
Temperatur dependence of the lattice constants of Mn1−xFexSi and Mn1−xCoxSi — •Tobias Konrad, Alexander Engelhardt, Christoph Resch, Andreas Bauer, and Christian Pfleiderer — Physik Department, Technical University Munich, D-85748 Garching, Germany
When magnetic order in the chiral magnet MnSi is suppressed under hydrostatic pressure, topological non-Fermi-liquid behavior emerges, where neutron Larmor diffraction of the lattice constants establishes the absence of quantum criticality [1-3]. Magnetic order in MnSi may also be suppressed by substitutional replacement of iron or cobalt on the manganese sites [4,5]. Using powder x-ray diffraction, we have studied the temperature dependence of the lattice constants of Mn1−xFexSi (0 ≤ x ≤ 0.22) and Mn1−xCoxSi (0 ≤ x ≤ 0.04) between room temperature and ∼ 12 K. The evolution of the lattice constants as a function of iron and cobalt concentration is discussed in comparison to changes of the lattice constants of MnSi under hydrostatic pressure.
[1] C. Pfleiderer et al., Nature 414, 427 (2001)
[2] C. Pfleiderer et al., Science 316, 1871 (2007)
[3] R. Ritz et al., Nature 497, 231 (2013)
[4] A. Bauer et al., Phys. Rev. B 82, 064404 (2010)
[5] J. Kindervater et al., Phys. Rev. B 101, 104406 (2020)