• 제목/요약/키워드: Dzyaloshinskii

검색결과 24건 처리시간 0.025초

Magnetic-vortex Dynamic Quasi-crystal Formation in Soft Magnetic Nano-disks

  • Kim, Junhoe;Kim, Sang-Koog
    • Journal of Magnetics
    • /
    • 제22권1호
    • /
    • pp.29-33
    • /
    • 2017

  • We report a micromagnetic numerical study on different quasi-crystal formations of magnetic vortices in a rich variety of dynamic transient states in soft magnetic nano-disks. Only the application of spin-polarized dc currents to a single magnetic vortex leads to the formation of topological-soliton quasi-crystals composed of different configurations of skyrmions with positive and negative half-integer numbers (magnetic vortices and antivortices). Such topological object formations in soft magnets, not only in the absence of Dzyaloshinskii-Moriya interaction but also without magnetocrystalline anisotropy, are discussed in terms of two different topological charges, the winding number and the skyrmion number. This work offers an insight into the dynamic topological-spin-texture quasi-crystal formations in soft magnets.

  • https://doi.org/10.4283/JMAG.2017.22.1.029 인용 PDF KSCI

수직자기이방성을 나타내는 W/CoFeB/MgO 박막에서 W두께와 열처리 온도에 따른 계면 드잘로신스키-모리야 상호작용 변화 분석 (Interfacial Dzyaloshinskii-Moriya interaction in W/CoFeB/MgO films with perpendicular magnetic anisotropy tuned by variation of the W thicknesses and annealing temperatures)

  • Kim, Gyu Won;Kim, Yong Jin;Cha, In Ho;Samardak, Alexander S.;Pal, Bappaditya;Kolesnikov, Alexander G.;Ognev, Alexey V.;Sadovnikov, Alexandr V.;Nikitov, Sergey A.;Kim, Young Keun
    • 한국자기학회:학술대회 개요집
    • /
    • 한국자기학회 2017년도 임시총회 및 하계학술연구발표회
    • /
    • pp.106-107
    • /
    • 2017

  • PDF

Asymmetrical domain wall propagation in bifurcated PMA wire structure due to the Dzyaloshinskii-Moriya interaction

  • Kwon, J.;Goolaup, S.;Gan, W.L.;Chang, C.H.;Roy, K.;Lew, W.S.
    • 한국자기학회:학술대회 개요집
    • /
    • 한국자기학회 2017년도 임시총회 및 하계학술연구발표회
    • /
    • pp.53-54
    • /
    • 2017

  • Direct observation of the DW dynamics in a bifurcated wire reveals that the propagation is via the splitting of DW at the junction, resulting in individual DW in each branch. The DMI induced DW tilting leads to quasi-selective propagation through the network structure, with favored branch determined by the tilting angle of the DW surface. This results in the DW in the individual branches having different depinning fields. Our work shows that by tuning the DMI constant in a material, selective DW motion through a network can be achieved.

  • PDF