AndreaBianchi

Professeur adjoint

When spins decide to do weird things: Skyrmions and Helimagnet

Filed in: Blog.When-spins-decide-to-do-weird-things-Skyrmions-and-Helimagnet · Modified on : Tue, 11 Jul 17

When spins decide to do weird things: Skyrmions and Helimagnet

Today, we will learn about chiral magnets and their skyrmions lattices. First of all, chiral magnets are form by a long-range helimagnetic order of the magnetic moments. This order exist at zero field and below a critical temperature. The order is form by a competition between ferromagnetic exchange, Dzyaloshinsky-Moriya(DM) interaction and anisotropy. When a field is applied, the helices point along the field and this produce the conical phase. In this phase, just below Tc, a skyrmion lattice correlations are stable and metastable is a larger region of the phase diagram. I will talk about a SANS, NSE and TEM studies done on Fe_(1-x)Co_xSi.

DOI: 10.1103/PhysRevB.95.144433 DOI:10.1103/PhysRevB.89.09441 DOI:10.1038/nature09124

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