Affiliation:
1. School of Electronics and Information Engineering, Suzhou Vocational University, Suzhou 215104, China
Abstract
It is of great academic significance to understand the influence that the atomic-scale structure of interfaces and boundaries within materials has on magnetic coupling characteristics and promote the innovation of advanced magnetic devices. Here, we carried out a systematic investigation of the atomic and electronic structures of twin boundaries (TBs) in Li0.5Fe2.5O4 (LFO) thin films and determined their concurrent magnetic couplings using atomic-resolution transmission electron microscopy and first-principle calculations at the atomic scale. The results show that ferromagnetic or antiferromagnetic coupling can exist across the different TBs in LFO thin films, and electrical structures within a few atomic layers directly rely on the atom arrangement across the TB. Uncovering one-to-one relationships between the magnetic coupling properties of individual TBs and atomic-scale structures can clarify a thorough comprehension of numerous fascinating magnetic properties of commonly utilized magnetic materials, which will undoubtedly encourage the progress of sophisticated magnetic materials and devices.
Funder
Natural Science Foundation of the Jiangsu Higher Education Institutions of China
Enterprise Practice of Young Teachers in Vocational Colleges in Jiangsu Province
Cultivation project of Suzhou vocational University
Science and Technology Planning Project of Suzhou City
“Qing Lan Project”of the Education Department of Jiangsu Province