What makes magnetic skyrmions different from magnetic bubbles?

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:465

Letter

Bogatyrev, Andrei B.¹  Metlov, Konstantin L.² 

[1] Russian Acad Sci, Inst Numer Math, 8 Gubkina Str,GSP 1, Moscow 1119991, Russia

[2] Donetsk Inst Phys & Technol, 72 R Luxembourg Str, UA-83114 Donetsk, Ukraine

关键词: Micromagnetics;    Skyrmions;    Magnetic bubbles;    Magnetic vortices;   

DOI  :  10.1016/j.jmmm.2018.06.058

来源: Elsevier

【 摘 要 】

A large enough piece of ferromagnet is usually not magnetized uniformly, but develops a magnetization texture. In thin films these textures can be doubly-periodic. Such are the well known magnetic bubble domains and the recently observed skyrmion magnetization textures in MnSi. In this paper we develop a theory of periodic magnetization textures, based on complex calculus to answer the question - is there a difference between those two textures even if they seem to carry the same topological winding number (or topological charge)? We find that such difference exists, facilitated by a different role played by the magnetization vector's in-plane phase. We separate classical-like and quantum-like features of magnetization textures and highlight the role of magnetic anisotropy in favouring either of these cases.

【 授权许可】

Free