Magnetically asymmetric interfaces in a LaMnO3/SrMnO3 superlattice due to structural asymmetries

被引：78

作者：

May, S. J. ^{[1
]}

Shah, A. B. ^{[2
]}

Velthuis, S. G. E. te ^{[1
]}

Fitzsimmons, M. R. ^{[3
]}

Zuo, J. M. ^{[2
]}

Zhai, X. ^{[4
]}

Eckstein, J. N. ^{[4
]}

Bader, S. D. ^{[1
,5
]}

Bhattacharya, A. ^{[1
,5
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

[2] Univ Illinois, Dept Mat Sci & Engn, Urbana, IL 61801 USA

[3] Los Alamos Natl Lab, Los Alamos, NM 87545 USA

[4] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[5] Argonne Natl Lab, Ctr Nanoscale Mat, Argonne, IL 60439 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.77.174409

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polarized neutron reflectivity measurements of a ferromagnetic [(LaMnO3)(11.8)/(SrMnO3)(4.4)](6) superlattice reveal a modulated magnetic structure with an enhanced magnetization at the interfaces where LaMnO3 was deposited on SrMnO3 (LMO/SMO). However, the opposite interfaces (SMO/LMO) are found to have a reduced ferromagnetic moment. The magnetic asymmetry is accompanied by a corresponding asymmetry in the lateral structural roughness of the two interfaces observed via electron microscopy, with enhanced ferromagnetism present at the interfaces that are atomically smooth over tens of nanometers. This result demonstrates that atomic-scale roughness can destabilize interfacial phases in complex oxide heterostructures.

引用

页数：5

共 18 条

[1] STRUCTURE AND GROWTH OF CRYSTALLINE SUPERLATTICES - FROM MONOLAYER TO SUPERLATTICE [J].