Regensburg 2016 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 42: Correlated Electrons: Frustrated Magnets - Cu-based Systems & FeCr
TT 42.9: Vortrag
Mittwoch, 9. März 2016, 11:45–12:00, H18
Neutron diffraction on the frustrated spin-chain linarite at low temperatures and high fields — •Leonie Heinze1, Britta Willenberg2, Jens-Uwe Hoffmann2, Anja U.B. Wolter-Giraud3, Bernd Büchner3, Kirrily C. Rule4, Andrew Studer4, Bachir Ouladdiaf5, and Stefan Süllow1 — 1Institut für Physik der Kondensierten Materie, TU Braunschweig — 2Helmholtz-Zentrum Berlin für Materialien und Energie — 3Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden — 4The Bragg Institute, ANSTO — 5Institut Laue-Langevin Grenoble
The natural mineral linarite, PbCuSO4(OH)2, has been established as a model compound of the frustrated one-dimensional spin chain with ferromagnetic nearest-neighbor and antiferromagnetic next-nearest-neighbor interactions [1]. Recently, it has been demonstrated that it exhibits a complex magnetic phase diagram in applied fields B || b axis up to 9.5 T for temperatures below 2.8 K [2].
Here, we present additional neutron diffraction experiments on the field induced phases of linarite, with special emphasis on the low temperature and high magnetic field regime for fields applied along the crystallographic b axis. This way, the temperature and field dependence of the magnetic moment were established for temperatures down to 50 mK and fields up to 9.5 T. As well, the nature of the phase transitions from phase IV into the surrounding phases being of first order was derived.
B. Willenberg et al., PRL 108 117202 (2012)
B. Willenberg et al., arXiv:1508.02207