Tuning the spin-flop transition in perpendicularly magnetized synthetic antiferromagnets by swift heavy Fe ions irradiation

Yun, Jijun; Sheng, Yuchen; Guo, Xi; Zheng, Bin; Chen, Peng; Cao, Yaoyao; Yan, Ze; He, Xiaodong; Jin, Peng; Li, Jing; Cui, Minghuan; Shen, Tielong; Yang, Dezheng; Zuo, Yalu; Xi, Li

doi:10.1103/physrevb.104.134416

Cited by 8 publications

(5 citation statements)

References 75 publications

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“…In particular, K eff was obtained by calculating the areal difference between the in-plane magnetization loop and the out-of-plane suitably averaged anhysteretic loop. [31] Magneto-Transport Measurements: Since SF/SAF samples have PMA, the magnetic field/current-driven magnetization switching could be characterized by the change of anomalous Hall resistance R Hall . When measuring the hysteresis loops under current, the direct current I DC was applied and the R Hall was recorded by the I DC .…”

Section: Methodsmentioning

confidence: 99%

“…In particular, K eff was obtained by calculating the areal difference between the in‐plane magnetization loop and the out‐of‐plane suitably averaged anhysteretic loop. [ 31 ]…”

Section: Methodsmentioning

confidence: 99%

“…The magnitude of K eff ranges from the 4.92 × 10 5 -7.09 × 10 5 J m −3 , which is consistent with previous reports. [30,31] By taking A = 1.5 × 10 −11 J m −1 , [28,32] the values of DM constants for these samples have been estimated and summarized in Table 1. The magnitude of D IF ranges from the 0.82-2.35 mJ m −2 , which is consistent with previous reports about IF-DMI in Pt/FM systems.…”

Section: Quantifying the Interlayer Dmimentioning

confidence: 99%

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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: Methodsmentioning

confidence: 99%

“…In particular, K eff was obtained by calculating the areal difference between the in‐plane magnetization loop and the out‐of‐plane suitably averaged anhysteretic loop. [ 31 ]…”

Section: Methodsmentioning

confidence: 99%

Section: Quantifying the Interlayer Dmimentioning

confidence: 99%

See 1 more Smart Citation

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

Yun

Cui

et al. 2023

Adv Funct Materials

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“…To get the exact thickness of the magnetic layers, each sample was characterized by a high-resolution X-ray reflection (XRR) spectrum, which was simulated using GenX software. [20,21] The simulated results are summarized in Supplementary Discussion 1, Supporting Information. The top Ta layer acts as a capping layer to protect Co out of oxidation from air, and the Pt layers could provide fcc(111) texture, which ensures the perpendicular magnetic anisotropy (PMA) in the adjacent Co layers.…”

Section: Methodsmentioning

confidence: 99%

Suppression Effect on the Domain Wall Tilting in Synthetic Antiferromagnetic Racetrack Driven by the Spin–Orbit Torque

Yun

Zhang

et al. 2022

Physica Rapid Research Ltrs

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The perpendicularly magnetized synthetic antiferromagnet is an ideal candidate for racetrack memory due to the low stray field, allowing the closely packed domain wall (DW) and high recording density. Herein, the dynamics of DW motion driven by the magnetic field and current are investigated in the synthetic antiferromagnetic (SAF) Ta/Pt/Co/Pt/Ru/Pt/Co/Ta structures with different thicknesses of the top magnetic (TM) Co layers. The results illustrate that the direction of the DW motion will be reversed when the field pulse is below a critical field for the sample with a negligible remanence ratio. As for the current‐driven DW motion case, a significant enhancement of the DW velocity, as well as a strong suppression effect on the tilting of DW's plane due to the strong interlayer exchange coupling for the SAF structure, is found. The fast DW velocity and small tilting angle in SAF are valuable for spintronic racetrack memories.

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“…Figure 1(c) displays the XRR results of three representative samples. Based on the fitting results from the GenX software, [35,36] the actual structures of these three samples are deter-mined to be: glass/Pt(1.0)/FeNi(4.8), Gr/FeNi(5.8), and Gr/Pt(0.5)/FeNi(5.8). The actual thicknesses of the samples are very close to the designed nominal thicknesses.…”

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confidence: 99%

Enhanced Spin–Orbit Torques in Graphene by Pt Adatoms Decoration

Wang 王,

Zhang 张,

Xu 徐

et al. 2024

Chinese Phys. Lett.

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Graphene (Gr) with widely acclaimed characteristics, such as exceptionally long spin diffusion length at room temperature, provides an outstanding platform for spintronics. However, its inherent weak spin-orbit coupling (SOC) has limited its efficiency for generating the spin currents in order to control the magnetization switching process for the application in spintronics memories. Following the theoretical prediction on the enhancement of SOC in Gr by heavy atoms adsorption, here we experimentally observe a sizeable spin-orbit torques (SOTs) in Gr by the decoration of its surface with Pt adatoms in Gr/Pt(t Pt )/FeNi trilayers with the optimal damping-like SOT efficiency around 0.55 by 0.6-nm-thick Pt layer adsorption. The value is nearly four times larger than that of the Pt/FeNi sample without Gr and nearly twice as large as that of the Gr/FeNi sample without Pt adsorption. The efficiency of the enhanced SOT in Gr by Pt adatoms is also demonstrated by the field-free SOT magnetization switching process with a relatively low critical current density around 5.4 MA/cm2 in Gr/Pt/FeNi trilayers with the in-plane magnetic anisotropy. These findings pave the way for Gr spintronics application, offering solutions for future low power consumption memories.

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Tuning the spin-flop transition in perpendicularly magnetized synthetic antiferromagnets by swift heavy Fe ions irradiation

Cited by 8 publications

References 75 publications

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

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

Suppression Effect on the Domain Wall Tilting in Synthetic Antiferromagnetic Racetrack Driven by the Spin–Orbit Torque

Enhanced Spin–Orbit Torques in Graphene by Pt Adatoms Decoration

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