Crystal structure and valence distribution of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices

Hironori Nakao; Jun Nishimura; Youichi Murakami; Akira Ohtomo; Tomoteru Fukumura; Masashi Kawasaki; Takashi Koida; Yusuke Wakabayashi; Hiroshi Sawa

doi:10.1143/JPSJ.78.024602

Crystal structure and valence distribution of [(LaMnO ₃) _m(SrMnO ₃) _m] _n artificial superlattices

Hironori Nakao, Jun Nishimura, Youichi Murakami, Akira Ohtomo, Tomoteru Fukumura, Masashi Kawasaki, Takashi Koida, Yusuke Wakabayashi, Hiroshi Sawa

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The crystal structure of [(LaMnO ₃) _m(SrMnO ₃) _m] _n artificial superlattices and the valence distribution of Mn ions have been studied using the X-ray scattering technique. The stacking structures were determined by the scattering intensities in the out-of-plane direction. The Mn valence distributions were evaluated by the energy dependence of the scattering intensity near the Mn K-edge, which was analyzed on the basis of the obtained crystal structures. The result indicates that the Mn valence becomes 3+ (4+) in the LaMnO ₃ (SrMnO ₃) layers, and the valence has an intermediate value between 3+ and 4+ only at the interface between LaMnO ₃ and SrMnO ₃ layers. We have also clarified that all the films are insulators independent of the periodicity m.

Original language	English
Article number	024602
Journal	journal of the physical society of japan
Volume	78
Issue number	2
DOIs	https://doi.org/10.1143/JPSJ.78.024602
Publication status	Published - 2009 Feb

Keywords

Charge ordering
Resonant X-ray scattering
Superlattice structure

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.78.024602

Cite this

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title = "Crystal structure and valence distribution of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices",

abstract = "The crystal structure of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices and the valence distribution of Mn ions have been studied using the X-ray scattering technique. The stacking structures were determined by the scattering intensities in the out-of-plane direction. The Mn valence distributions were evaluated by the energy dependence of the scattering intensity near the Mn K-edge, which was analyzed on the basis of the obtained crystal structures. The result indicates that the Mn valence becomes 3+ (4+) in the LaMnO 3 (SrMnO 3) layers, and the valence has an intermediate value between 3+ and 4+ only at the interface between LaMnO 3 and SrMnO 3 layers. We have also clarified that all the films are insulators independent of the periodicity m.",

keywords = "Charge ordering, Resonant X-ray scattering, Superlattice structure",

author = "Hironori Nakao and Jun Nishimura and Youichi Murakami and Akira Ohtomo and Tomoteru Fukumura and Masashi Kawasaki and Takashi Koida and Yusuke Wakabayashi and Hiroshi Sawa",

year = "2009",

month = feb,

doi = "10.1143/JPSJ.78.024602",

language = "English",

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TY - JOUR

T1 - Crystal structure and valence distribution of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices

AU - Nakao, Hironori

AU - Nishimura, Jun

AU - Murakami, Youichi

AU - Ohtomo, Akira

AU - Fukumura, Tomoteru

AU - Kawasaki, Masashi

AU - Koida, Takashi

AU - Wakabayashi, Yusuke

AU - Sawa, Hiroshi

PY - 2009/2

Y1 - 2009/2

N2 - The crystal structure of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices and the valence distribution of Mn ions have been studied using the X-ray scattering technique. The stacking structures were determined by the scattering intensities in the out-of-plane direction. The Mn valence distributions were evaluated by the energy dependence of the scattering intensity near the Mn K-edge, which was analyzed on the basis of the obtained crystal structures. The result indicates that the Mn valence becomes 3+ (4+) in the LaMnO 3 (SrMnO 3) layers, and the valence has an intermediate value between 3+ and 4+ only at the interface between LaMnO 3 and SrMnO 3 layers. We have also clarified that all the films are insulators independent of the periodicity m.

AB - The crystal structure of [(LaMnO 3) m(SrMnO 3) m] n artificial superlattices and the valence distribution of Mn ions have been studied using the X-ray scattering technique. The stacking structures were determined by the scattering intensities in the out-of-plane direction. The Mn valence distributions were evaluated by the energy dependence of the scattering intensity near the Mn K-edge, which was analyzed on the basis of the obtained crystal structures. The result indicates that the Mn valence becomes 3+ (4+) in the LaMnO 3 (SrMnO 3) layers, and the valence has an intermediate value between 3+ and 4+ only at the interface between LaMnO 3 and SrMnO 3 layers. We have also clarified that all the films are insulators independent of the periodicity m.

KW - Charge ordering

KW - Resonant X-ray scattering

KW - Superlattice structure

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