Mechanism of fast domain wall motion via current-assisted Bloch-point domain wall stabilization

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Mechanism of fast domain wall motion via current-assisted Bloch-point domain wall stabilization. / De Riz, A.; Hurst, J.; Schöbitz, M.; Thirion, C.; Bachmann, J.; Toussaint, J. C.; Fruchart, O.; Gusakova, D.

In: Physical Review B, Vol. 103, No. 5, 054430, 19.02.2021.

Research output: Contribution to journal › Article › peer-review

Author

De Riz, A. ; Hurst, J. ; Schöbitz, M. ; Thirion, C. ; Bachmann, J. ; Toussaint, J. C. ; Fruchart, O. ; Gusakova, D. / Mechanism of fast domain wall motion via current-assisted Bloch-point domain wall stabilization. In: Physical Review B. 2021 ; Vol. 103, No. 5.

BibTeX

@article{55fdad83f1d941e5a8d7e3fe7d40e48c,

title = "Mechanism of fast domain wall motion via current-assisted Bloch-point domain wall stabilization",

abstract = "Two types of domain walls exist in magnetically soft cylindrical nanowires: the transverse-vortex wall (TVW) and the Bloch-point wall (BPW). The latter is expected to prevent the usual Walker breakdown and thus enable high domain wall speed. We showed recently [M. Sch{\"o}bitz, Phys. Rev. Lett. 123, 217201 (2019)10.1103/PhysRevLett.123.217201] that the previously overlooked Oersted field associated with an electric current is a key in experiments to stabilize the BPW and reach speed above 600m/s with spin transfer. Here, we investigate in detail this situation with micromagnetic simulations and modeling. The switching of the azimuthal circulation of the BPW to match that of the Oersted field occurs above a threshold current scaling with 1/R3 (R is the wire radius), through mechanisms that may involve the nucleation and/or annihilation of Bloch points. The domain wall dynamics then remains of a below-Walker type, with speed largely determined by spin-transfer torque alone.",

author = "{De Riz}, A. and J. Hurst and M. Sch{\"o}bitz and C. Thirion and J. Bachmann and Toussaint, {J. C.} and O. Fruchart and D. Gusakova",

year = "2021",

month = feb,

day = "19",

doi = "10.1103/PhysRevB.103.054430",

language = "English",

volume = "103",

journal = "Physical Review B-Condensed Matter",

issn = "1098-0121",

publisher = "American Physical Society",

number = "5",

}

RIS

TY - JOUR

T1 - Mechanism of fast domain wall motion via current-assisted Bloch-point domain wall stabilization

AU - De Riz, A.

AU - Hurst, J.

AU - Schöbitz, M.

AU - Thirion, C.

AU - Bachmann, J.

AU - Toussaint, J. C.

AU - Fruchart, O.

AU - Gusakova, D.

PY - 2021/2/19

Y1 - 2021/2/19

N2 - Two types of domain walls exist in magnetically soft cylindrical nanowires: the transverse-vortex wall (TVW) and the Bloch-point wall (BPW). The latter is expected to prevent the usual Walker breakdown and thus enable high domain wall speed. We showed recently [M. Schöbitz, Phys. Rev. Lett. 123, 217201 (2019)10.1103/PhysRevLett.123.217201] that the previously overlooked Oersted field associated with an electric current is a key in experiments to stabilize the BPW and reach speed above 600m/s with spin transfer. Here, we investigate in detail this situation with micromagnetic simulations and modeling. The switching of the azimuthal circulation of the BPW to match that of the Oersted field occurs above a threshold current scaling with 1/R3 (R is the wire radius), through mechanisms that may involve the nucleation and/or annihilation of Bloch points. The domain wall dynamics then remains of a below-Walker type, with speed largely determined by spin-transfer torque alone.

AB - Two types of domain walls exist in magnetically soft cylindrical nanowires: the transverse-vortex wall (TVW) and the Bloch-point wall (BPW). The latter is expected to prevent the usual Walker breakdown and thus enable high domain wall speed. We showed recently [M. Schöbitz, Phys. Rev. Lett. 123, 217201 (2019)10.1103/PhysRevLett.123.217201] that the previously overlooked Oersted field associated with an electric current is a key in experiments to stabilize the BPW and reach speed above 600m/s with spin transfer. Here, we investigate in detail this situation with micromagnetic simulations and modeling. The switching of the azimuthal circulation of the BPW to match that of the Oersted field occurs above a threshold current scaling with 1/R3 (R is the wire radius), through mechanisms that may involve the nucleation and/or annihilation of Bloch points. The domain wall dynamics then remains of a below-Walker type, with speed largely determined by spin-transfer torque alone.

UR - http://www.scopus.com/inward/record.url?scp=85101824557&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.103.054430

DO - 10.1103/PhysRevB.103.054430

M3 - Article

AN - SCOPUS:85101824557

VL - 103

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 5

M1 - 054430

ER -

ID: 77893828