Figure 3
A THz pulse resonant with an electromagnon excites spin motion in the sample. An X-ray pulse resonant with the Mn L2-edge measures the response as changes in the intensity of the (0 q 0) diffraction peak. (a) Peak intensity response of the driving electric field. (b) Peak intensity response with opposite sign of the driving field. (c) The response disappears when the sample is warmed up above the spin-cycloid phase. Figure reprinted with permission from Kubacka et al. (2014). |