Effect of interlayer Dzyaloshinskii-Moriya interaction on spin structure in synthetic antiferromagnetic multilayers

Guo, Yaqin; Zhang, Jingyan; Cui, Qirui; Liu, Ruoyang; Ga, Yonglong; Zhan, Xiaozhi; Lyu, Haochang; Hu, Chaoqun; Li, Jialiang; Zhou, Jingbo; Wei, Hongxiang; Zhu, Tao; Yang, Haolin; Wang, Shouguo

doi:10.1103/physrevb.105.184405

Cited by 12 publications

(6 citation statements)

References 52 publications

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“…[17,18] The IL-DMI is beneficial to designing 3D chiral spin textures that possess fundamental importance and the associated technological promises. [19,20] Currently, several experiments have observed the IL-DMI in perpendicularly magnetized synthetic antiferromagnets (SAF), [21][22][23] and FM/ NM/FM sandwiches with two orthogonally magnetized FM layers. [24,25] Besides, some works reveal that IL-DMI is promising to facilitate field-free switching in spin orbit torque (SOT)-driven memory applications.…”

Section: Introductionmentioning

confidence: 99%

Anisotropic Interlayer Dzyaloshinskii–Moriya Interaction in Synthetic Ferromagnetic/Antiferromagnetic Sandwiches

Yun

Cui

et al. 2023

Adv Funct Materials

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The interfacial Dzyaloshinskii–Moriya interaction (DMI) in ferromagnetic/non‐magnetic‐metal bilayers is essential to stabilize chiral spin textures for potential applications. Recent works reveal that the interlayer DMI is beneficial to designing 3D chiral spin textures that possess fundamental importance and the associated technological promises. Here, the interlayer DM constants are determined quantitatively in synthetic ferromagnetic/antiferromagnetic Pt/Co/Pt/Ru/Pt/Co/Ta structures. The results demonstrate that the interlayer DMI shows uniaxial anisotropic characteristics. The first‐principles calculations elucidate that the anisotropic interlayer DMI is induced by the in‐plane symmetry breaking along two high symmetric directions, which favors the magnetization of adjacent ferromagnetic layers canting in different directions. The anisotropic interlayer DMI is also confirmed by spin‐orbit torque driven asymmetric magnetization switching. Moreover, the interlayer DMI can be tuned by the Ru‐layer‐thickness and beneficial to designing 3D spin textures for future spintronic devices.

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Section: Introductionmentioning

confidence: 99%

Anisotropic Interlayer Dzyaloshinskii–Moriya Interaction in Synthetic Ferromagnetic/Antiferromagnetic Sandwiches

Yun

Cui

et al. 2023

Adv Funct Materials

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“…Contrary to the more conventional interfacial case of DMI, the interlayer version mediates orthogonal spin configurations between separate magnetic layers, rather than within the same magnetic layer. Recently, after being predicted by Monte Carlo calculations [28] and experimental verifications of i-DMI in double PMA and synthetic antiferromagnetic (SAF) systems [29,30], several seminal works had further utilized it to achieve current-induced field-free magnetization switching [31,32]. The advantages of exploiting i-DMI to realize field-free switching within PMA systems are manifold.…”

Section: Introductionmentioning

confidence: 99%

University Technology Commercialization in Taiwan: National Taiwan University (NTU) and National Taiwan University of Science and Technology (NTUST)

Liu¹,

Chen²,

Chiou³

et al. 2011

Academic Entrepreneurship in Asia

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The large amount of data collected by LiDAR sensors brings the issue of LiDAR point cloud compression (PCC). Previous works on LiDAR PCC have used range image representations and followed the predictive coding paradigm to create a basic prototype of a coding framework. However, their prediction methods give an inaccurate result due to the negligence of invalid pixels in range images and the omission of future frames in the time step. Moreover, their handcrafted design of residual coding methods could not fully exploit spatial redundancy. To remedy this, we propose a coding framework BIRD-PCC. Our prediction module is aware of the coordinates of invalid pixels in range images and takes a bidirectional scheme. Also, we introduce a deep-learned residual coding module that can further exploit spatial redundancy within a residual frame. Experiments conducted on SemanticKITTI and KITTI-360 datasets show that BIRD-PCC outperforms other methods in most bitrate conditions and generalizes well to unseen environments.

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“…For any kind of DMI to exist, including IL-DMI, two key ingredients are essential: breaking of inversion symmetry and a strong SOC. While symmetry breaking in multilayers is ensured by the interfaces, strong SOC is typically provided by the electronic properties of heavy metals with unfilled d-shells (Pt, Ir, or Pd) used as spacing layers, and so far, all investigations on IL-DMI were limited to this sample design 22 , 24 – 26 . It is, however, known that lighter materials with very weak intrinsic spin–orbit parameters can nevertheless develop strong SOC due to the large Rashba splitting of their (non-polarized) band structure 30 – 32 .…”

Section: Introductionmentioning

confidence: 99%

Large interlayer Dzyaloshinskii-Moriya interactions across Ag-layers

Arregi,

Riego,

Berger

et al. 2023

Nat Commun

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Seeking to enhance the strength of the interlayer Dzyaloshinskii-Moriya interaction (IL-DMI) through a combination of atomic and Rashba type spin-orbit coupling (SOC) we studied the strength and the thickness evolution of effective interlayer coupling in Co/Ag/Co trilayers by means of surface sensitive magneto-optical measurements that take advantage of the light penetration depth. Here, we report the observation of oscillatory, thickness-dependent chiral interaction between ferromagnetic layers. Despite the weakness of the Ag atomic SOC, the IL-DMI in our trilayers is orders of magnitude larger than that of known systems using heavy metals as a spacer except of recently reported −0.15 mJ/m2 in Co/Pt/Ru(t)/Pt/Co and varies between ≈ ±0.2 mJ/m2. In contrast to known multilayers Co/Ag/Co promotes in-plane chirality between magnetic layers. The strength of IL-DMI opens up new routes for design of three-dimensional chiral spin structures combining intra- and interlayer DMI and paves the way for enhancements of the DMI strength.

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Effect of interlayer Dzyaloshinskii-Moriya interaction on spin structure in synthetic antiferromagnetic multilayers

Cited by 12 publications

References 52 publications

Anisotropic Interlayer Dzyaloshinskii–Moriya Interaction in Synthetic Ferromagnetic/Antiferromagnetic Sandwiches

Anisotropic Interlayer Dzyaloshinskii–Moriya Interaction in Synthetic Ferromagnetic/Antiferromagnetic Sandwiches

University Technology Commercialization in Taiwan: National Taiwan University (NTU) and National Taiwan University of Science and Technology (NTUST)

Large interlayer Dzyaloshinskii-Moriya interactions across Ag-layers

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