Fig. 4: Static order and dynamic fluctuations in TbMn6Sn6.
From: Low-temperature magnetic crossover in the topological kagome magnet TbMn6Sn6
a The temperature dependences of the internal magnetic fields for the three magnetic components. Vertical lines mark the critical temperatures TC1 and TC2. TC2 is the transition temperature from high temperature low field to low temperature high field component, while TC1 is the transition temperature, below which two high field components, exhibiting volume wise competition, are observed. The error bars represent the standard deviation of the fit parameters. Right axis depicts the amplitude of the oscillating component of the muon-spin rotation signal from up-down (U-D) positron detectors. b The temperature dependences of the relative volume fractions (f1, f2, f3) of the three magnetically ordered regions. c Zero-field muon-spin rotation signals from Forward-Backward (F-B) positron detectors, recorded at various temperatures. d The temperature dependence of dynamic depolarization rate of the muon-spin rotation signal, measured in F-B positron detectors. Arrows mark the magnetic transition temperature TC1 and the temperature \({T}_{{{{{{{{\rm{C1}}}}}}}}}^{* }\) for the onset of visible magnetic fluctuations. Inset of panel (d) shows the muon stopping site within the structure of TbMn6Sn6. e A schematic overview of the experimental setup for the muon spin forming 45∘ with respect to the c-axis of the crystal. The sample was surrounded by four detectors: Forward (F), Backward (B), Up (U) and Down (D). f Schematic illustration of the muon spin precession around the internal magnetic field for two cases: The field is perpendicular to the c-axis and points towards the U-detector. θ is the angle between the magnetic field and the muon spin polarization at t = 0. The field is parallel to the c-axis of the crystal and points towards the F-detector.
