Direct Observation of Domain-Wall Surface Tension by Deflating or Inflating a Magnetic Bubble

Zhang, Xueying; Vernier, N.; Zhao, Weisheng; Yu, Haiming; Vila, Laurent; Zhang, Yue; Ravelosona, D.

doi:10.1103/physrevapplied.9.024032

Cited by 31 publications

(51 citation statements)

References 39 publications

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“…Jm     , which is in very good agreement with previous studies [37,43]. Finally, by considering 0 depin H  =16 mT, a typical gradient of δ~∆, the experimental values…”

supporting

confidence: 91%

Domain-Wall Motion Driven by Laplace Pressure in Co−Fe−B/MgO Nanodots with Perpendicular Anisotropy

Zhang

Vernier

et al. 2018

Phys. Rev. Applied

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We have studied the magnetization reversal of CoFeB-MgO nanodots with perpendicular anisotropy for size ranging from w=400 nm to 1 μm. Contrary to previous experiments, the switching field distribution is shifted toward lower magnetic fields as the size of the elements is reduced with a mean switching field varying as 1/w. We show that this mechanism can be explained by the nucleation of a pinned magnetic domain wall (DW) at the edges of the nanodots where damages are introduced by the patterning process. As the surface tension (Laplace pressure) applied on the DW increases when reducing the size of the nanodots, we demonstrate that the depinning field to reverse the entire elements varies as 1/w. These results suggest that the presence of DWs has to be considered in the switching process of nanoscale elements and open a path toward scalable spintronic devices.

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“…Jm     , which is in very good agreement with previous studies [37,43]. Finally, by considering 0 depin H  =16 mT, a typical gradient of δ~∆, the experimental values…”

supporting

confidence: 91%

Domain-Wall Motion Driven by Laplace Pressure in Co−Fe−B/MgO Nanodots with Perpendicular Anisotropy

Zhang

Vernier

et al. 2018

Phys. Rev. Applied

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“…3b, c) indicate that domain contraction is significantly faster than domain expansion. We attribute this asymmetry to the tendency of the reversed domain to shrink in order to reduce the DW surface tension 37,38 . The latter is proportional to the DW length and can thus significantly offset the balance of SOT, pinning potential, and demagnetizing field.…”

Section: Resultsmentioning

confidence: 99%

High-speed domain wall racetracks in a magnetic insulator

et al. 2019

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Recent reports of current-induced switching of ferrimagnetic oxides coupled to heavy metals have opened prospects for implementing magnetic insulators into electrically addressable devices. However, the configuration and dynamics of magnetic domain walls driven by electrical currents in insulating oxides remain unexplored. Here we investigate the internal structure of the domain walls in Tm3Fe5O12 (TmIG) and TmIG/Pt bilayers, and demonstrate their efficient manipulation by spin–orbit torques with velocities of up to 400 ms−1 and minimal current threshold for domain wall flow of 5 × 106 A cm−2. Domain wall racetracks are defined by Pt current lines on continuous TmIG films, which allows for patterning the magnetic landscape of TmIG in a fast and reversible way. Scanning nitrogen-vacancy magnetometry reveals that the domain walls of TmIG thin films grown on Gd3Sc2Ga3O12 exhibit left-handed Néel chirality, changing to an intermediate Néel–Bloch configuration upon Pt deposition. These results indicate the presence of interfacial Dzyaloshinskii–Moriya interaction in magnetic garnets, opening the possibility to stabilize chiral spin textures in centrosymmetric magnetic insulators.

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“…X. Zhang et al . reported that the DW surface tension with regard to the iDMI influenced the static and dynamic DW behavior 39 . The DW surface tension can also be considerable to affect the asymmetrical semi-circular DW expansion at the junction.…”

Section: Resultsmentioning

confidence: 99%

Bidirectional propagation of tilting domain walls in perpendicularly magnetized T shaped structure with the interfacial Dzyaloshinskii-Moriya interaction

Kwon

Hwang

Hong

et al. 2018

Sci Rep

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Understanding of domain wall (DW) propagation in a complex structure is an essential first step toward the development of any magnetic-domain based devices including spin-based logic or magnetic memristors. Interfacial Dzyaloshinskii-Moriya interaction (iDMI) in the structure with broken inversion symmetry induces an asymmetrical DW configuration with respect to the direction of in-plane field. Dynamic behaviors of field-driven DW within the film with perpendicular magnetic anisotropy is influenced by DW tilt from the iDMI effect and the corners in the T-shaped structure of the DW path. Images from Kerr microscopy reveal that the iDMI effective field contributes to a tilted structure of DW configuration and evolution along its propagation. With the combination of iDMI and T-shaped structure, we observed two distinguished bidirectional DW propagations in two output branches and distinct arriving times at the destination pads with a uniform external field. Micromagnetic simulation results is compared with the observed dynamics of a DW configuration in the structure providing an additional confirmation of the interpreted results.

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Direct Observation of Domain-Wall Surface Tension by Deflating or Inflating a Magnetic Bubble

Cited by 31 publications

References 39 publications

Domain-Wall Motion Driven by Laplace Pressure in Co−Fe−B/MgO Nanodots with Perpendicular Anisotropy

Domain-Wall Motion Driven by Laplace Pressure in Co−Fe−B/MgO Nanodots with Perpendicular Anisotropy

High-speed domain wall racetracks in a magnetic insulator

Bidirectional propagation of tilting domain walls in perpendicularly magnetized T shaped structure with the interfacial Dzyaloshinskii-Moriya interaction

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