Spontaneous positive exchange bias effect in SrFeO_(3-x)/SrCoO_(3-x) epitaxial bilayer

作     者：Tian-Cong Su Jun Zhang Wei Zhang Ying-Ying Wang Hui-Hui Ji Xiao-Jiao Wang Guo-Wei Zhou Zhi-Yong Quan Xiao-Hong Xu Tian-Cong Su;Jun Zhang;Wei Zhang;Ying-Ying Wang;Hui-Hui Ji;Xiao-Jiao Wang;Guo-Wei Zhou;Zhi-Yong Quan;Xiao-Hong Xu

作者机构：School of Chemistry and Materials ScienceShanxi Normal UniversityLinfen 041004China Department of Chemistry and Chemical EngineeringLvliang UniversityLvliang 033001China Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of EducationLinfen 041004China Research Institute of Materials ScienceShanxi Normal UniversityLinfen 041004China Collaborative Innovation Center for Shanxi Advanced Permanent Magnetic Materials and TechonologyLinfen 041004China 

出 版 物：《Rare Metals》 (稀有金属（英文版）)

年 卷 期：2021年第40卷第7期

页      面：1858-1864页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：the National Natural Science Foundation of China(Nos.51871137 and 51901118) the Graduate Student Innovation Project in Shanxi Normal University(Nos.010901053014 and 010903010050) 

主　　题：SrFeO_(3-x)/SrCoO_(3-x)bilayer Spontaneous positive exchange bias Long-range dipole field Exchange coupling 

摘      要：A novel phenomenon of spontaneous positive exchange bias(PEB)is reported in SrFeO_(3-x)/SrCoO_(3-x) epitaxial bilayer without undergoing any magnetic field *** inserting a thick SrTiO3(STO)nonmagnetic spacer(about 6 nm)into the bilayer interface,this phenomenon still *** on a series of testing means,the spontaneous PEB effect is supposed to be mainly related to short-range ferromagnetic(FM)exchange coupling at the interface when there is no STO *** the STO interlayer reaches up to a certain thickness,shortrange coupling interaction basically *** this time,the long-range dipole field may be responsible for the coupling of the FM and antiferromagnetic(AFM)layer across the nonmagnetic STO and then leads to the same bias *** discoveries provide a new way to realize and manipulate spontaneous exchange bias-based spintronics devices,such as magnetic recording heads and spin valves.