Dynamic solitons in antiferromagnets (Review Article)

Emergence of transient domain wall skyrmions after ultrafast demagnetization

“…For a broader discussion of dynamical properties of topological magnetic solitons in AFM materials the reader is referred to Ref. [16]. Thus while static properties of topological solitons are similar in FM and AFM cases, dynamical properties of solitons in AFM materials are strongly influenced by the exchange enhancement due to the Weiss exchange field.…”

“…Such objects are intensely studied due to the ability to manipulate them with electrical currents through interfacial spin-orbit torques [10][11][12], bulk spin-transfer torques [13], as well as interfacial spin-transfer torques [14]. Skyrmions have also been proposed in antiferromagnetic materials [15], being a type of two-dimensional antiferromagnetic topological soliton [16], and could potentially be used as information carriers in antiferromagnetic spintronics [17]. Other related topological structures include antiskyrmions [18,19], skyrmioniums [20], or more generally skyrmion bags [21].…”

Magnetic Inhomogeneities in 3D Ferromagnetic spin system

“…Magnetic inhomogenity and soliton study is a recent field of investigation and of great importance in fundamental physics as well as in different research areas [1][2][3]. Such magnetic inhomogeneity occurs in real magnetic materials due to the appearance of various magnetic defects such as imperfect grain boundaries, impurities as well as elastic defects such as misfitting precipitates and dislocations.…”

3D analytical model of skyrmion-like structures in an antiferromagnet with DMI

“…The particular cases of the solutions (13), (15) in a ferromagnet include the well-known one dimensional solutions such as Bloch domain [38], Neel domain wall [39], Shirobokov domain structure [40], antiferromagnetic vortices [41,42], two dimensional Belavin-Polyakov soliton [43], three dimensional Hodenkov soliton [44] and target type soliton [45]. The results of this paper can be used for further development of theory of the antiferromagnetic soliton physics [28,46,47] and theory of topological spin-hall [48] and spin torque [49,50] effects at antiferromagnetic skyrmions and domain walls with skyrmion-like structure under "subcritical" and "supercritical" modes of movement.…”

“…where  and  are the polar and azimuth angles for the antiferromagnetic vector, It is important to note that the Lorentz-invariance is present even for non-zero DMI, whereas the presence of the magnetic field destroy this invariance, but keep a special kind of Lorentz-covariance, see [26,27] and for details recent review [28].…”