Edge instability in a chiral stripe domain under an electric current and skyrmion generation

Lin, Shi Zeng

doi:10.1103/physrevb.94.020402

Cited by 55 publications

(50 citation statements)

References 38 publications

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“…The creation of skyrmion bubbles in such a junction constriction driven by inhomogeneous spin currents was further studied independently by Heinonen et al [106], S.-Z. Lin [107], and Liu et al [108], confirming its efficient mechanism and device compatibility suitable for future applications.…”

Section: Spin-polarized Electric Currentmentioning

confidence: 88%

Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications

Zhang¹,

Zhou²,

Song³

et al. 2020

J. Phys.: Condens. Matter

389

302

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The field of skyrmionics has been actively investigated across a wide range of topics during the last decade. In this topical review, we review and discuss key results and findings in skyrmionics since the first experimental observation of magnetic skyrmions in 2009. We particularly focus on the theoretical, computational and experimental findings and advances that are directly relevant to the spintronic applications based on magnetic skyrmions, i.e. their writing, deleting, reading and processing driven by magnetic field, electric current and thermal energy. We then review several potential applications including information storage, logic computing gates and non-conventional devices such as neuromorphic computing devices. Finally, we discuss possible future research directions on magnetic skyrmions, which also cover rich topics on other topological textures such as antiskyrmions and bimerons in antiferromagnets and frustrated magnets.

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Section: Spin-polarized Electric Currentmentioning

confidence: 88%

Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications

Zhang¹,

Zhou²,

Song³

et al. 2020

J. Phys.: Condens. Matter

389

302

View full text Add to dashboard Cite

show abstract

“…We notice that the current density needed to break the stripe domains is fairly low. 22 This phenomenon indicates that the energy barrier at the vicinity of the magnetic domain transition is lowered by increasing magnetic field 23 and this might be the reason for the reduced current density. It also should be mentioned that the critical magnetic field to form the biskyrmions can be influenced by the sample thickness, which results in the sequence of biskyrmion generation and annihilation along the gradient thickness of the sample.…”

Section: Resultsmentioning

confidence: 99%

“…The interaction between topological charge and conduction electrons induces the spin Hall torque that generates the observed Néel-type skyrmions. 22 Based on the theoretical simulations, it has been proposed that the current-induced STT can facilitate the generation of the Bloch-type skyrmions. 22 However, thus far, no experimental study on this issue has been reported.…”

Section: Introductionmentioning

confidence: 99%

Generation of high-density biskyrmions by electric current

Peng

Zhang

et al. 2017

npj Quant Mater

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Much interest has been focused on the manipulation of magnetic skyrmions, including the generation, annihilation, and motion behaviors, for potential applications in spintronics. Here, we experimentally demonstrate that a high-density Bloch-type biskyrmion lattice in MnNiGa can be generated by applying electric current. It is revealed that the density of biskyrmions can be remarkably increased by increasing the electric current, in contrast to the scattered biskyrmions induced by a magnetic field alone. Furthermore, the transition from the ferromagnetic state to the stripe domain structure can be terminated by the electric current, leading to the biskyrmions dominated residual domain pattern. These biskyrmions in such residual domain structure are extremely stable at zero magnetic and electric fields and can further evolve into the high-density biskyrmion lattice over a temperature range from 100 to 330 K. Our experimental findings open up a new pathway for the generation of skyrmion lattice by electric current manipulation.

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“…The generation of magnetic skyrmions has recently been demonstrated by applying magnetic fields 10 , spin-polarized currents 27,32 , local heating 33 , laser beams 34,35 and electric voltage 36,37 . Meanwhile, skyrmions can also be generated in geometrical constricted devices 6,[38][39][40][41][42] by applying electrical currents 43 . For example, the dynamical generation of skyrmions can be realized by squeezing chiral band domains through a (magnetic) geometrically constriction after being subjected to spatially inhomogeneous spin-orbit torques (SOTs) 6,40,41,44,45 .…”

Section: P a G E 3 | 18mentioning

confidence: 99%

“…Meanwhile, skyrmions can also be generated in geometrical constricted devices 6,[38][39][40][41][42] by applying electrical currents 43 . For example, the dynamical generation of skyrmions can be realized by squeezing chiral band domains through a (magnetic) geometrically constriction after being subjected to spatially inhomogeneous spin-orbit torques (SOTs) 6,40,41,44,45 . In addition, skyrmions can also be generated in a constricted region as a result of inhomogeneous current induced nonlinear magnetization dynamics 38,41 .…”

Section: P a G E 3 | 18mentioning

confidence: 99%

Generation and Hall effect of skyrmions enabled using nonmagnetic point contacts

et al. 2019

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P a g e 2 | 18 To enable functional skyrmion-based spintronic devices, the controllable generation and manipulation of skyrmions is essential. While the generation of skyrmions by using a magnetic geometrical constriction has already been demonstrated, this approach is difficult to combine with a subsequent controlled manipulation of skyrmions. The high efficiency of skyrmion generation from magnetic constrictions limits the useful current density, resulting in stochastic skyrmion motion, which may obscure topological phenomena such as the skyrmion Hall effect. In order to address this issue, we designed a nonmagnetic conducting Ti/Au point contact in devices made of Ta/CoFeB/TaOx trilayer films. By applying high voltage pulses, we experimentally demonstrated that skyrmions can be dynamically generated. Moreover, the accompanied spin topology dependent skyrmion dynamics -the skyrmion Hall effect is also experimentally observed in the same devices. The creation process has been numerically reproduced through micromagnetic simulations in which the important role of skyrmion-antiskyrmion pair generation is identified. The motion and Hall effect of the skyrmions, immediately after their creation is described using a modified Thiele equation after taking into account the contribution from spatially inhomogeneous spin-orbit torques and the Magnus force. The simultaneous generation and manipulation of skyrmions using a nonmagnetic point contact could provide a useful pathway for designing novel skyrmion based devices.conducted data analysis. Z.W., X.Z. and W.J. wrote the manuscript. All authors commented on the manuscript. Additional information.Preprints and permission information is available online at www.nature.com/reprints.

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Edge instability in a chiral stripe domain under an electric current and skyrmion generation

Cited by 55 publications

References 38 publications

Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications

Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications

Generation of high-density biskyrmions by electric current

Generation and Hall effect of skyrmions enabled using nonmagnetic point contacts

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