基于Dzyaloshinsky-Moriya相互作用和人工的磁斯格明子研究
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摘要
磁性斯格明子是一种实空间拓扑准粒子,它展现出丰富、新奇的物理性质,为自旋电子学的研究提供了新的方向。另一方面,由于其具有尺寸小、稳定性高、易操控等特性,在未来的存储器件中也有潜在应用价值。本文简单介绍了在国家重点研发计划量子调控与量子信息重点专项(2017YFA0303200)资助下,对基于Dzyaloshinsky-Moriya相互作用和人工的两种磁性斯格明子进行的系统研究。
Magnetic skyrmion is a topological quasiparticle in the real space. Due to the observed unconventional phenomena, magnetic skyrmion has become a hot topic in spintronics community. In addition, magnetic skyrmions are also promising candidates for future information technology due to their small size and to the small current densities needed to displace them. In this article, we review our recent progress on the magnetic skyrmion with and without Dzyaloshinsky-Moriya interaction under the support of the National Key R&D Program of China(Grant 2017 YFA0303200).
Magnetic skyrmion is a topological quasiparticle in the real space. Due to the observed unconventional phenomena, magnetic skyrmion has become a hot topic in spintronics community. In addition, magnetic skyrmions are also promising candidates for future information technology due to their small size and to the small current densities needed to displace them. In this article, we review our recent progress on the magnetic skyrmion with and without Dzyaloshinsky-Moriya interaction under the support of the National Key R&D Program of China(Grant 2017 YFA0303200).
引文
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[19] Cowburn R P,Koltsov D K,Adeyeye A O,et al.Single-domain circular nanomagnets [J].Phys.Rev.Lett.,1999,83:1042
[20] Ding H F,Schmid A K,Li D Q,et al.Magnetic bistability of Co nanodots [J].Phys.Rev.Lett.,2005,94:157202
[21] Sun L,Cao R X,Miao B F,et al.Creating an Artificial Two-Dimensional Skyrmion Crystal by Nanopatterning [J].Phys.Rev.Lett.,2013,110:167201
[22] Miao B F,Wen Y,Yan M,et al.Micromagnetic study of excitation modes of an artificial skyrmion crystal [J].Appl.Phys.Lett.,2015,107:222402
[23] Dai Y Y,Wang H,Tao P,et al.Skyrmion ground state and gyration of skyrmions in magnetic nanodisks without the Dzyaloshinsky-Moriya interaction [J].Phys.Rev.B,2013,88:054403
[2] Skyrme T H R.A unifield field theory of mesons and baryons [J].Nucl.Phys.,1962,31:556
[3] Muhlbauer S,Binz B,Jonietz F,et al.Skyrmion Lattice in a Chiral Magnet [J].Science,2009,323:915
[4] Yu X Z,Onose Y,Kanazawa N,et al.Real-space observation of a two-dimensional skyrmion crystal [J].Nature,2010,465:901
[5] Yu X Z,Kanazawa N,Onose Y,et al.Near room-temperature formation of a skyrmion crystal in thin-films of the helimagnet FeGe [J].Nat.Mater.,2011,10:106
[6] Heinze S,von Bergmann K,Menzel M,et al.Spontaneous atomic-scale magnetic skyrmion lattice in two dimensions [J].Nat.Phys.,2011,7:713
[7] Li W,Jin C M,Che R C,et al.Emergence of skyrmions from rich parent phases in the molybdenum nitrides [J].Phys.Rev.B,2016,93:060409
[8] Nagaosa N,Tokura Y.Topological properties and dynamics of magnetic skyrmions [J].Nat.Nanotechnol.,2013,8:899
[9] Sampaio J,Cros V,Rohart S,et al.Nucleation,stability and current-induced motion of isolated magnetic skyrmions in nanostructures [J].Nat.Nanotechnol.,2013,8:839
[10] Jiang W J,Upadhyaya P,Zhang W,et al.Blowing magnetic skyrmion bubbles [J].Science,2015,349:283
[11] Du H F,Che R C,Kong L Y,et al.Edge-mediated skyrmion chain and its collective dynamics in a confined geometry [J].Nat.Commun.,2015,6:8504
[12] Jin C M,Li Z A,Kovacs A,et al.Control of morphology and formation of highly geometrically confined magnetic skyrmions [J].Nat.Commun.,2017,8:15569
[13] Zhao X B,Jin C M,Wang C,et al.Direct imaging of magnetic field-driven transitions of skyrmion cluster states in FeGe nanodisks [J].Proc.Natl.Acad.Sci.U.S.A.,2016,113:4918
[14] Zheng F S,Li H,Wang S S,et al.Direct Imaging of a Zero-Field Target Skyrmion and Its Polarity Switch in a Chiral Magnetic Nanodisk [J].Phys.Rev.Lett.,2017,119:197205
[15] Du H F,Zhao X B,Rybakov F N,et al.Interaction of Individual Skyrmions in a Nanostructured Cubic Chiral Magnet [J].Phys.Rev.Lett.,2018,120:197203
[16] Rybakov F N,Borisov A B,Blugel S,et al.New Type of Stable Particlelike States in Chiral Magnets [J].Phys.Rev.Lett.,2015,115:117201
[17] Zheng F S,Rybakov F N,Borisov A B,et al.Experimental observation of chiral magnetic bobbers in B20-type FeGe [J].Nat.Nanotechnol.,2018,13:451
[18] Munzer W,Neubauer A,Adams T,et al.Skyrmion lattice in the doped semiconductor Fe1-xCoxSi [J].Phys.Rev.B,2010,81:041203
[19] Cowburn R P,Koltsov D K,Adeyeye A O,et al.Single-domain circular nanomagnets [J].Phys.Rev.Lett.,1999,83:1042
[20] Ding H F,Schmid A K,Li D Q,et al.Magnetic bistability of Co nanodots [J].Phys.Rev.Lett.,2005,94:157202
[21] Sun L,Cao R X,Miao B F,et al.Creating an Artificial Two-Dimensional Skyrmion Crystal by Nanopatterning [J].Phys.Rev.Lett.,2013,110:167201
[22] Miao B F,Wen Y,Yan M,et al.Micromagnetic study of excitation modes of an artificial skyrmion crystal [J].Appl.Phys.Lett.,2015,107:222402
[23] Dai Y Y,Wang H,Tao P,et al.Skyrmion ground state and gyration of skyrmions in magnetic nanodisks without the Dzyaloshinsky-Moriya interaction [J].Phys.Rev.B,2013,88:054403