Figure 6
Q-scans around the two spin states at representative fields as marked and 3 K.
(a) H-scans around (H, 0, 0) at selected fields clearly showing that the H-center shifts to higher values as the field increases. (b) L-scans around (Hmax, 0, 0) with Hmax taken from (a) at selected fields clearly showing that with increasing field, the central peak corresponding to the SDW state weakens largely and almost vanishes into the background above ~0.18 T. (c) H-scans around (H, 0, 0) at selected fields clearly showing that with decreasing field, the H-center keeps almost unchanged. (d) L-scans around (Hmax, 0, 0) at selected fields clearly showing that while decreasing the field to 0 T, the central peak corresponding to the SDW state does not come back as shown in (b). These interesting field- and temperature-dependent behaviors indicate that the itinerant SDW state, unlike that of the conventional long-ranged AFM ordering (a magnetic domain), is much more delicate consistent with the previous Mössbauer study [50]. The solid lines in (a–d) are Lorentzian fits and error bars are statistical errors. For clarity, the intensities in (b–d) are vertically shifted.
