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Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator
Wang, Fei; Xiao, Di; Yuan, Wei; Jiang, Jue; Zhao, Yi-Fan; Zhang, Ling; Yao, Yunyan; Liu, Wei; Zhang, Zhidong; Liu, Chaoxing; Shi, Jing; Han, Wei; Chan, Moses H. W.; Samarth, Nitin; Chang, Cui-Zu
2019-05-01
Source PublicationNANO LETTERS
ISSN1530-6984
Volume19Issue:5Pages:2945-2952
AbstractInducing magnetic orders in a topological insulator (TI) to break its time reversal symmetry has been predicted to reveal many exotic topological quantum phenomena. The manipulation of magnetic orders in a TI layer can play a key role in harnessing these quantum phenomena toward technological applications. Here we fabricated a thin magnetic TI film on an antiferromagnetic (AFM) insulator Cr2O3 layer and found that the magnetic moments of the magnetic TI layer and the surface spins of the Cr2O3 layers favor interfacial AFM coupling. Field cooling studies show a crossover from negative to positive exchange bias clarifying the competition between the interfacial AFM coupling energy and the Zeeman energy in the AFM insulator layer. The interfacial exchange coupling also enhances the Curie temperature of the magnetic TI layer. The unique interfacial AFM alignment in magnetic TI on AFM insulator heterostructures opens a new route toward manipulating the interplay between topological states and magnetic orders in spin-engineered heterostructures, facilitating the exploration of proof-of-concept TI-based spintronic and electronic devices with multifunctionality and low power consumption.
KeywordTopological insulators antiferromagnetic insulators exchange coupling effect antiferromagnetic coupling exchange bias effect
Indexed BySCI
Language英语
WOS IDWOS:000467781900023
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81129
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Wang, Fei,Xiao, Di,Yuan, Wei,et al. Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator[J]. NANO LETTERS,2019,19(5):2945-2952.
APA Wang, Fei.,Xiao, Di.,Yuan, Wei.,Jiang, Jue.,Zhao, Yi-Fan.,...&Chang, Cui-Zu.(2019).Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator.NANO LETTERS,19(5),2945-2952.
MLA Wang, Fei,et al."Observation of Interfacial Antiferromagnetic Coupling between Magnetic Topological Insulator and Antiferromagnetic Insulator".NANO LETTERS 19.5(2019):2945-2952.
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