Two-dimensional characterization of three-dimensional magnetic bubbles in Fe3Sn2 nanostructures

Author:

Tang Jin1,Wu Yaodong12,Kong Lingyao3,Wang Weiwei4,Chen Yutao1,Wang Yihao1,Soh Y5,Xiong Yimin1,Tian Mingliang13,Du Haifeng14

Affiliation:

1. Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory of the Chinese Academy of Sciences, and University of Science and Technology of China, Hefei 230031, China

2. Universities Joint Key Laboratory of Photoelectric Detection Science and Technology in Anhui Province, Hefei Normal University, Hefei 230601, China

3. School of Physics and Materials Science, Anhui University, Hefei 230601, China

4. Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China

5. Paul Scherrer Institute, 5232 Villigen, Switzerland

Abstract

Abstract We report differential phase contrast scanning transmission electron microscopy (TEM) of nanoscale magnetic objects in Kagome ferromagnet Fe3Sn2 nanostructures. This technique can directly detect the deflection angle of a focused electron beam, thus allowing clear identification of the real magnetic structures of two magnetic objects including three-ring and complex arch-shaped vortices in Fe3Sn2 by Lorentz-TEM imaging. Numerical calculations based on real material-specific parameters well reproduced the experimental results, showing that the magnetic objects can be attributed to integral magnetizations of two types of complex three-dimensional (3D) magnetic bubbles with depth-modulated spin twisting. Magnetic configurations obtained using the high-resolution TEM are generally considered as two-dimensional (2D) magnetic objects previously. Our results imply the importance of the integral magnetizations of underestimated 3D magnetic structures in 2D TEM magnetic characterizations.

Funder

National Key Research and Development Program of China

Key Research Program of Frontier Sciences

Chinese Academy of Sciences

Natural Science Foundation of China

Universities Joint Key Laboratory of Photoelectric Detection Science and Technology in Anhui Province

Anhui Province Key Laboratory of Simulation and Design for Electronic Information System

Publisher

Oxford University Press (OUP)

Subject

Multidisciplinary

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