Investigation of magnetization reversal process in pinned CoFeB thin film by <italic>in-situ</italic> Lorentz TEM

Investigation of magnetization reversal process in pinned CoFeB thin film by in-situ Lorentz TEM

Pei Ke^{1, 2, 3}, Xia Wei-Xing^{2, 3, †}, Wang Bao-Min^{2, 3}, Wen Xing-Cheng^{2, 3}, Sheng Ping^{2, 3}, Liu Jia-Ping^{2, 3, 4}, Liu Xin-Cai^{1, ‡}, Li Run-Wei^{2, 3}

(color online) In-situ LTEM results of sample A, showing (a) low-magnified bright field image and SADP and high magnification image (insets), ((b)–(f)) domain reversal process with magnetic field decreasing from 15 Oe to −15 Oe, which correspond to points b–f on the loop of sample A in Fig. 1, respectively, (g) sketch of imaging principle of ripple domain in LTEM, (h) a cross-tie domain on the primary domain wall, and (i) sketch of spin configuration of a cross-tie domain. The scale bars in panels (b)–(f) are all the same.