Magnetoelastic coupling and tricritical metamagnetism

Baumfeld, Oliver L.

doi:10.25560/53072

Cited by 2 publications

(1 citation statement)

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“…The continuous dimming of the satellite diffractions along the [010] direction is clearly recorded in Videos S1 and S2 (Supporting Information). Notably, a new magnetic feature distinct from the initial helical order emerges at ≈228 K. Based on previous investigations, [40] a possible magnetic order named the cycloidal structure of MnCoSi below 228 K is shown in Figure 3f with the different simulated LTEM images in the two vertical [100] and [010] view directions. Unlike the helical spin order in which bright/dark stripes are always observed in the images during specimen rotation around helical vector k z (Figure 3e), cycloids with the spins rotating in the bc plane containing screw vector k z represent stripe contrast only in the bc plane and no magnetic features in the ac plane (Figure 3f).…”

Section: Resultsmentioning

confidence: 67%

Observation of Short‐Period Helical Spin Order and Magnetic Transition in a Nonchiral Centrosymmetric Helimagnet

Ding

et al. 2022

Adv Funct Materials

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The search for materials exhibiting nanoscale spiral order continues to be fuelled by the promise of emergent inductors. Although such spin textures have been reported in many materials, most of them exhibit long periods or are limited to operate far below room temperature. Here, the real‐space observation of an ordered helical spin order with a period of 3.2 nm in a nonchiral centrosymmetric helimagnet MnCoSi at room temperature via multiangle and multiazimuth approach of Lorentz transmission electron microscopy (TEM) is presented. A magnetic transition from the ordered helical spin order to a cycloidal spin order below 228 K is clearly revealed by in situ neutron powder diffraction and Lorentz TEM, which is closely correlated with temperature‐induced variation in magneto‐crystalline anisotropy. These results reveal the origin of spiral ordered spin textures in nonchiral centrosymmetric helimagnet, which can serve as a new strategy for searching materials with nanoscale spin order with potential applications in emergent electromagnetism.

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Section: Resultsmentioning

confidence: 67%