Domain wall dynamics in easy-cone magnets

Jang, Peong Hwa; Oh, Se Hyeok; Kim, Se Kwon; Lee, Kyung Jin

doi:10.1103/physrevb.99.024424

Cited by 9 publications

(5 citation statements)

References 72 publications

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“…with the microstrain variation shown in figure 5. The diffraction peak broadens with the increase of annealing time, which indicates that the tissue is gradually refined [11] , which is consistent with the results of metallographic tissue analysis. However, the diffraction peak at 75 min was about 44°, which was significantly shifted compared to the diffraction peaks of the first four samples (about 43°), probably due to the change in grain orientation at 75 min, which shifted the diffraction peak and affected the change in internal residual magnetism, resulting in an increase in residual magnetism.…”

Section: Xrd and Microstrain At Different Annealing Timessupporting

confidence: 87%

Study on the demagnetization process of the hot rolled medium carbon steel

Cui,

Zhu,

Deng

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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Residual magnetism is always of presence in the medium carbon steel formed in the hot rolling process even by the traditional demagnetization treatment. In order to eliminate the residual magnetism in the typical medium carbon steel, the steel was annealed at 650℃ for different holding time. It is found that, at the early stage of the annealing process, the residual magnetism in the steel decreases gradually with increasing the annealing time. When the annealing time reaches 60 min., The removed residual magnetism reaches a peak. It is attributed to the dissolution and the spheroidization of carbide structure during the annealing process, and the decrease of the micro-strain in the steel, as well. When the annealing time increased from 60 min. to 75 min., the residual magnetism increases with increasing the annealing time for the formation of the heterogeneous microstructure in the steel.

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Section: Xrd and Microstrain At Different Annealing Timessupporting

confidence: 87%

Study on the demagnetization process of the hot rolled medium carbon steel

Cui,

Zhu,

Deng

et al. 2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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“…and K s is the surface anisotropy energy. Samples with t Pd = 10.35 and 12.6 nm from the Ta-series existed in the easy-cone state 39,40 , the formation of which requires the implementation of the following conditions: K eff < 0, K 2 > 0, and K 2 > À 1 2 K eff . Since we know the cone state angle θ = 45°, the K 2 value can be calculated using the relation…”

Section: Resultsmentioning

confidence: 99%

“…, Ks is the surface anisotropy energy. Samples with tPd = 10.35 and 12.6 nm from the Ta-series possessed the easy-cone state 39,40 , the formation of which requires the implementation of the following conditions: Keff <0, K2 >0, and…”

mentioning

confidence: 99%

Enhancement of perpendicular magnetic anisotropy and Dzyaloshinskii–Moriya interaction in thin ferromagnetic films by atomic-scale modulation of interfaces

et al. 2020

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To stabilize nontrivial spin textures, e.g., skyrmions or chiral domain walls in ultrathin magnetic films, an additional degree of freedom, such as the interfacial Dzyaloshinskii-Moriya interaction (IDMI), must be induced by the strong spin-orbit coupling (SOC) of a stacked heavy metal layer. However, advanced approaches to simultaneously control the IDMI and perpendicular magnetic anisotropy (PMA) are needed for future spin-orbitronic device implementations. Here, we show the effect of atomic-scale surface modulation on the magnetic properties and IDMI in ultrathin films composed of 5d heavy metal/ferromagnet/4d(5d) heavy metal or oxide interfaces, such as Pt/CoFeSiB/Ru, Pt/CoFeSiB/ Ta, and Pt/CoFeSiB/MgO. The maximum IDMI value corresponds to the correlated roughness of the bottom and top interfaces of the ferromagnetic layer. The proposed approach for significant enhancement of PMA and the IDMI through interface roughness engineering at the atomic scale offers a powerful tool for the development of spinorbitronic devices with precise and reliable controllability of their functionality.

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“…It provides improved functionalities of various spintronics devices, such as low-power operation of spin-transfer torque (STT) MRAMs [4][5][6] and zerofield precession of STT oscillators 7 . Moreover, it hosts spin superfluids associated with spontaneous breaking of U(1) spin-rotational symmetry 8,9 and allows unique easy-cone domain wall dynamics 10 . The existence of the easy-cone state was experimentally verified in various layered structures 6,11,12 .…”

Section: Introductionmentioning

confidence: 99%

Intrinsic origin of interfacial second-order magnetic anisotropy in ferromagnet/normal metal heterostructures

et al. 2020

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Interfacial perpendicular magnetic anisotropy, which is characterized by the firstorder (K1) and second-order (K2) anisotropies, is the core phenomenon for nonvolatile magnetic devices. A sizable K2 satisfying a specific condition stabilizes the easy-cone state, where equilibrium magnetization forms at an angle from the film normal. The easy-cone state offers intriguing possibilities for advanced spintronic devices and unique spin textures, such as spin superfluids and easy-cone domain walls. Experimental realization of the easy-cone state requires understanding the origin of K2, thereby enhancing K2. However, previously proposed origins of K2 cannot fully account for experimental results. Here we show experimentally that K2 scales almost linearly with the work-function difference between the Co and X layers in Pt/Co/X heterostructures (X = Pd, Cu, Pt, Mo, Ru, W, and Ta), suggesting the central role of the inversion asymmetry in K2. Our result provides a guideline for enhancing K2 and realizing magnetic applications based on the easy-cone state.

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Domain wall dynamics in easy-cone magnets

Cited by 9 publications

References 72 publications

Study on the demagnetization process of the hot rolled medium carbon steel

Study on the demagnetization process of the hot rolled medium carbon steel

Enhancement of perpendicular magnetic anisotropy and Dzyaloshinskii–Moriya interaction in thin ferromagnetic films by atomic-scale modulation of interfaces

Intrinsic origin of interfacial second-order magnetic anisotropy in ferromagnet/normal metal heterostructures

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