Hongxin Yang

Affiliations

• SPINTEC, Univ. Grenoble Alpes, CEA/INAC, CNRS, F-38000 Grenoble, France
• Laboratoire de Physique des Solides, Univ. Paris-Sud, Orsay , France
• Unité Mixte de Physique CNRS/Thales, Palaiseau, France and Univ. Paris-Sud, Orsay, France

Title

Anatomy of Dzyaloshinskii-Moriya interaction at ferromagnet/normal-metal interfaces

Abstract

Dzyaloshinskii-Moriya Interaction (DMI) [1] is recognized recently to play a crucial role at ferromagnetic (FM) and heavy nonmagnetic metals (NM) interfaces to create magnetic skyrmions [2]. DMI also plays an essential role for fast domain wall dynamics driven by spin-orbit torques [3]. We calculate and clarify the main features and microscopic mechanisms of DMI in Co/Pt and other ferromagnet/nonmagnet bilayers [4]. It is found that DMI is predominantly located at the interfacial Co layer, originating from spin-orbit energy provided by the adjacent NM layer. Furthermore, no direct correlation is found between DMI and proximity induced magnetism in Pt. The thickness dependencies as well as the impact of interfacial mixing on DMI values in Co/Pt inetrfaces will be also discussed.

References

• [1] I. E. Dzialoshinskii, Sov. Phys. JETP 5, 1259 (1957); T. Moriya, Phys. Rev. 120, 91 (1960).
• [2] A. Fert, V. Cros, and J. Sampaio, Nat. Nanotechnol. 8, 152 (2013).
• [3] A. Thiaville, S. Rohart, E. Jue, V. Cros, and A. Fert, Europhys. Lett. 100, 57002 (2012).
• [4] H. X. Yang, A. Thiaville, S. Rohart, A. Fert and M. Chshiev, arXiv:1501.05511.