Real space observation of skyrmion polycrystallization and its domain boundary behavior in FeGe1−xSix. (18th February 2015)

• Record Type: Journal Article
• Authors: Nagao, Masahiro; So, Yeong-Gi; Yoshida, Hiroyuki; Nagai, Takuro; Edagawa, Keiichi; Saito, Kaichi; Hara, Toru; Yamazaki, Atsushi; Kimoto, Koji
• Is Part Of: Applied physics express. Volume 8:Number 3(2015:Mar.)
• Publication Date: 2015-02-18
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/APEX.8.033001
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: In magnetic skyrmion crystals (SkXs), the quality of skyrmion ordering affects the motion under electric current and temperature gradient. However, the crystalline nature itself remains an open issue. We report the observation of skyrmion polycrystallization in FeGe1− x Si x as a function of x by Lorentz transmission electron microscopy. With increasing x, the SkX changes from single crystalline to polycrystalline, concomitantly with the formation of the interfaces referred to as domain boundaries. In situ observations have revealed that the domain boundary formation competes the tendency to accommodate the differences between orientations of the SkX.