Fig. 4: Evolution of Magnetic Ordering with Temperature.
From: Atomic-scale visualization of a cascade of magnetic orders in the layered antiferromagnet GdTe3
a CDW peak intensities from FTs of scans on GdTe3 taken with a spin-polarized Cr tip at VBias = -400 mV, ISet = 60 pA, as a function of temperature (topographies shown in Supplementary Fig. 14); y-axis normalization is to the maximum Fourier amplitude in the Cr tip run. Three distinct regimes are observed: a low-temperature region below 7 K in which the intensities are constant, an intermediate temperature phase between 7 K and 12 K where the intensities are considerably larger, and a high temperature region in which the intensities return to approximately the same, constant intensity as found below 7 K. Red points were taken on the temperature upsweep, while blue points were taken on the down sweep. b CDW peak intensities from FTs of GdTe3 scans taken with a spin-degenerate W tip at VBias = -240 mV, ISet = 240 pA, as a function of temperature (topographies shown in Supplementary Fig. 18), with y-axis normalization to the maximum Fourier amplitude in the W tip run. The intensities stay approximately constant, and any changes are random. c Linecuts along the CDW direction from FTs of the temperature-dependence, cropped to show the area around the CDW peak (highlighted by the shaded region). The CDW peak intensity significantly increases in the intermediate temperature regime. d Representative dI/dV spectra taken with a W tip on GdTe3 in each of the 3 temperature regimes; the electronic density of states is nearly identical, providing further evidence that the pattern in a is due to magnetic ordering. Setpoint for dI/dV spectra are VBias = -600 mV and ISet = 60 pA. e Schematic illustrating how the interaction between CDW order and ferromagnetic (FM) order would result in a daughter spin density wave order, represented by the spins of varying magnitudes in the bottom row.
