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Magnetic skyrmions - André Thiaville

Laboratoire de Physique des Solides


Skyrmions, first introduced as singularities in field theory for the purpose of representing particles and their interaction with a bosonic field, have been later considered in several domains of condensed matter physics. This seminar will propose an overview of the recent domain of real-space, magnetic skyrmions.

Most of the talk will be devoted to ultrathin (one nanometer or less in thickness) films, where skyrmions have been recently found to be stabilized by a chiral interaction, the interfacial Dzyaloshinskii-Moriya antisymmetric exchange. The emphasis will be on the experimental side, with a micromagnetic point of view. For statics, the structure, stability and its relation with topology will be discussed. For dynamics, the action of various spin-transfer torques will be described.

Nucleation, stability and current-induced motion of isolated magnetic skyrmions in nanostructures, J. Sampaio, V. Cros, S. Rohart, A. Thiaville, A. Fert, Nat. Nanotech. 8, 839 (2013).

Skyrmion confinement in ultrathin film nanostructures in the presence of Dzyaloshinskii-Moriya interaction, S. Rohart, A. Thiaville, Phys. Rev. B 88, 184422 (2013).

Thermal stability of isolated skyrmions in an ultrathin magnetic film, S. Rohart, J. Miltat and A. Thiaville, arXiv:1601.02875.

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