Deformation of Topologically-Protected Supercooled Skyrmions in a Thin Plate of Chiral Magnet Co8Zn8Mn4

Morikawa, Daichi; Yu, Xiaojiang; Karube, Kosuke; Tokunaga, Yusuke; Taguchi, Y.; Arima, T.; Tokura, Y.

doi:10.1021/acs.nanolett.6b04821

Cited by 48 publications

(41 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We observe two types of elliptical skyrmions with opposite chirality and different elongation directions, which are tied to the crystal's high symmetry directions. The ellipticity is therefore an intrinsic property of materials with D 2d symmetry, in contrast to the recently observed distorted skyrmions in confined B20 materials [23][24][25][26][27][28] . The formation of two distinct chiral spin textures with opposite topological charges of ±1 in one material system makes the D 2d and related systems especially fascinating.…”

mentioning

confidence: 73%

Elliptical Bloch skyrmion chiral twins in an antiskyrmion system

et al. 2020

View full text Add to dashboard Cite

Skyrmions and antiskyrmions are distinct topological chiral spin textures that have been observed in various material systems depending on the symmetry of the crystal structure. Here we show, using Lorentz transmission electron microscopy, that arrays of skyrmions can be stabilized in a tetragonal inverse Heusler with D 2d symmetry whose Dzyaloshinskii-Moriya interaction (DMI) otherwise supports antiskyrmions. These skyrmions can be distinguished from those previously found in several B20 systems which have only one chirality and are circular in shape. We find Bloch-type elliptical skyrmions with opposite chiralities whose major axis is oriented along two specific crystal directions: [010] and [100]. These structures are metastable over a wide temperature range and we show that they are stabilized by longrange dipole-dipole interactions. The possibility of forming two distinct chiral spin textures with opposite topological charges of ±1 in one material makes the family of D 2d materials exceptional.

show abstract

mentioning

confidence: 73%

Elliptical Bloch skyrmion chiral twins in an antiskyrmion system

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Co10Zn10, one end-member of a solid solution (Co0.5Zn0.5)20-xMnx (0 ≤ x ≤ 20) with the β-Mn structure (16), shows a helical ordering of Co spins (periodicity λ ~ 185 nm) below Tc ~ 460 K, with Tc decreasing as the partial substitution of Mn proceeds. In Co8Zn8Mn4 (Tc ~ 300 K), a SkX state created close to Tc can persist as a metastable state over a very wide temperature and magnetic field region upon a field cooling (FC), accompanied by a latticeform transformation of the SkX at low temperatures (17,18). The other end-member Mn20 (β-Mn itself) is well-known to display no transition to magnetic long range order (19,20) due to the strong geometrical frustration of antiferromagnetic interactions in the threedimensional hyper-kagome network of the 12d sites (21).…”

Section: Introductionmentioning

confidence: 99%

Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…In a number of materials it has been observed that the equilibrium skyrmion region is stable over a significantly wider temperature range in thin films than in bulk crystals [7,9,[29][30][31]. One intriguing example of these materials is Cu 2 OSeO 3 , which is a multiferroic insulator that hosts magnetic skyrmions in a phase diagram that is qualitatively very similar to that of MnSi.…”

Section: Introductionmentioning

confidence: 99%

Stability and metastability of skyrmions in thin lamellae ofCu2OSeO3

Wilson

Birch

Štefančič

et al. 2020

Phys. Rev. Research

View full text Add to dashboard Cite

We report small angle X-ray scattering (SAXS) measurements of the skyrmion lattice in two 200 nm thick Cu2OSeO3 lamellae aligned with the applied magnetic field parallel to the out of plane [110] or [100] crystallographic directions. Our measurements show that the equilibrium skyrmion phase in both samples is expanded significantly compared to bulk crystals, existing between approximately 30 and 50 K over a wide region of magnetic field. This skyrmion state is elliptically distorted at low fields for the [110] sample, and symmetric for the [100] sample, possibly due to crystalline anisotropy becoming more important at this sample thickness than it is in bulk samples. Furthermore, we find that a metastable skyrmion state can be observed at low temperature by field cooling through the equilibrium skyrmion pocket in both samples. In contrast to the behavior in bulk samples, the volume fraction of metastable skyrmions does not significantly depend on cooling rate. We show that a possible explanation for this is the change in the lowest temperature of the skyrmion state in this lamellae compared to bulk, without requiring different energetics of the skyrmion state. arXiv:1909.07855v1 [cond-mat.str-el]

show abstract

Deformation of Topologically-Protected Supercooled Skyrmions in a Thin Plate of Chiral Magnet Co₈Zn₈Mn₄

Cited by 48 publications

References 30 publications

Elliptical Bloch skyrmion chiral twins in an antiskyrmion system

Elliptical Bloch skyrmion chiral twins in an antiskyrmion system

Disordered skyrmion phase stabilized by magnetic frustration in a chiral magnet

Stability and metastability of skyrmions in thin lamellae ofCu2OSeO3

Contact Info

Product

Resources

About