Magnetic properties of bilayer Sr3Ir2O7: Role of epitaxial strain and oxygen vacancies

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	Magnetic properties of bilayer Sr3Ir2O7: Role of epitaxial strain and oxygen vacancies
	Kim, Bongjae ; Liu, Peitao ; Franchini, Cesare
刊名	PHYSICAL REVIEW B
	2017-01-06
卷号	95 期号:2 页码:-
ISSN号	2469-9950
通讯作者	Kim, B (reprint author), Univ Vienna, Fac Phys, Vienna, Austria. ; Kim, B (reprint author), Ctr Computat Mat Sci, Vienna, Austria.
中文摘要	Using ab initio methods, we investigate the modification of the magnetic properties of the m = 2 member of the strontium iridates Ruddlesden Popper series Srm+1IrmO3m+1, bilayer Sr3Ir2O7, induced by epitaxial strain and oxygen vacancies. Unlike the single-layer compound Sr2IrO4, which exhibits a robust in-plane magnetic order, the energy difference between in-plane and out-of-plane magnetic orderings in Sr3Ir2O7 is much smaller and it is expected that small external perturbations could induce magnetic transitions. Our results indicate that epitaxial strain yields a spin-flop transition, which is driven by the crossover between the intralayer J(1) and interlayer J(2) magnetic exchange interactions upon compressive strain. While J(1) is essentially insensitive to strain effects, the strength of J(2) changes by one order of magnitude for tensile strains In addition, our study clarifies that the unusual in-plane magnetic response observed in Sr3Ir2O7 upon the application of an external magnetic field originates from the canting of the local magnetic moments due to oxygen vacancies, which locally destroy the octahedral networks, thereby allowing for noncollinear spin configurations.
学科主题	Physics, Condensed Matter
收录类别	SCI
资助信息	Austrian Science Fund (FWF) [I1490-N19]; Indian Department of Science and Technology (DST) project INDOX [I1490-N19]; China Scholarship Council (CSC)-FWF Scholarship Program
语种	英语
公开日期	2017-08-17
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/78347]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	Kim, Bongjae,Liu, Peitao,Franchini, Cesare. Magnetic properties of bilayer Sr3Ir2O7: Role of epitaxial strain and oxygen vacancies[J]. PHYSICAL REVIEW B,2017,95(2):-.
APA	Kim, Bongjae,Liu, Peitao,&Franchini, Cesare.(2017).Magnetic properties of bilayer Sr3Ir2O7: Role of epitaxial strain and oxygen vacancies.PHYSICAL REVIEW B,95(2),-.
MLA	Kim, Bongjae,et al."Magnetic properties of bilayer Sr3Ir2O7: Role of epitaxial strain and oxygen vacancies".PHYSICAL REVIEW B 95.2(2017):-.