Anisotropic Dzyaloshinskii-Moriya Interaction in ultra-thin epitaxial Au/Co/W(110)

Lorenzo Camosi (1) , Stanislas Rohart (2) , Olivier Fruchart (3, 1) , Stefania Pizzini (1) , Mohamed Belmeguenai (4) , Yves Roussigné (4) , Andreï Stachkevitch (4) , Mourad Chérif Salim (4) , Laurent Ranno (1) , Maurizio de Santis (5) , Jan Vogel (1)

1 NEEL - MNM - Micro et NanoMagnétisme
2 LPS - Laboratoire de Physique des Solides
3 SPINTEC - SPINtronique et TEchnologie des Composants
4 LSPM - Laboratoire des Sciences des Procédés et des Matériaux
5 NEEL - SIN - Surfaces, Interfaces et Nanostructures

We have used Brillouin Light Scattering spectroscopy to independently determine the in-plane Magneto-Crystalline Anisotropy and the Dzyaloshinskii-Moriya Interaction (DMI) in out-of-plane magnetized Au/Co/W(110). We found that the DMI strength is 2.5 larger along the bcc[001] than along the bcc[-110] direction. We use analytical considerations to illustrate the relationship between the crystal symmetry of the stack and the anisotropy of microscopic DMI. This shows that systems with two-fold symmetry are promising for realizing isolated elliptical skyrmions or anti-skyrmions.

Mots clés: Dzyaloshinskii-Moriya interaction; Brillouin Light Scattering; Skyrmions

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Autre [cond-mat.other]

Lorenzo Camosi, Stanislas Rohart, Olivier Fruchart, Stefania Pizzini, Mohamed Belmeguenai, et al.. Anisotropic Dzyaloshinskii-Moriya Interaction in ultra-thin epitaxial Au/Co/W(110). 2017. ⟨hal-01426434v1⟩