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

S. J. May; A. B. Shah; S. G.E. Te Velthuis; M. R. Fitzsimmons; J. M. Zuo; X. Zhai; J. N. Eckstein; S. D. Bader; A. Bhattacharya

doi:10.1103/PhysRevB.77.174409

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

S. J. May, A. B. Shah, S. G.E. Te Velthuis, M. R. Fitzsimmons, J. M. Zuo, X. Zhai, J. N. Eckstein, S. D. Bader, A. Bhattacharya

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Abstract

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.

Original language	English (US)
Article number	174409
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	77
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.77.174409
State	Published - May 8 2008

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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May, S. J., Shah, A. B., Te Velthuis, S. G. E., Fitzsimmons, M. R., Zuo, J. M., Zhai, X., Eckstein, J. N., Bader, S. D., & Bhattacharya, A. (2008). Magnetically asymmetric interfaces in a LaMnO3 / SrMnO3 superlattice due to structural asymmetries. Physical Review B - Condensed Matter and Materials Physics, 77(17), Article 174409. https://doi.org/10.1103/PhysRevB.77.174409

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abstract = "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.",

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T1 - Magnetically asymmetric interfaces in a LaMnO3 / SrMnO3 superlattice due to structural asymmetries

AU - May, S. J.

AU - Shah, A. B.

AU - Te Velthuis, S. G.E.

AU - Fitzsimmons, M. R.

AU - Zuo, J. M.

AU - Zhai, X.

AU - Eckstein, J. N.

AU - Bader, S. D.

AU - Bhattacharya, A.

PY - 2008/5/8

Y1 - 2008/5/8

N2 - 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.

AB - 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.

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

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