Resonance effect in ELNES from perovskite-type manganites BiMnO3 and LaMnO3

Yasukazu Murakami; Daisuke Shindo; Masae Kikuchi; Jianm Min Zuo; John C.H. Spence

doi:10.1093/jmicro/51.2.99

Resonance effect in ELNES from perovskite-type manganites BiMnO₃ and LaMnO₃

Yasukazu Murakami, Daisuke Shindo, Masae Kikuchi, Jianm Min Zuo, John C.H. Spence

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

Abstract

Fine structures in electron energy-loss spectra, observed 30-40 eV beyond the threshold of oxygen K-edges in perovskite-type manganites BiMnO₃ and LaMnO₃, are discussed. LaMnO₃ with orthorhombic symmetry (space group Pbnm) shows a clear peak in this region. However, BiMnO₃ with a heavily distorted perovskite-type structure (monoclinic, space group C2) does not show an appreciable peak. It is demonstrated that peaks in this energy region arise from the resonance effect of ejected core electrons and that the shape is sensitive to the environment of neighbouring oxygen atoms in the perovskite-type structures.

Original language	English (US)
Pages (from-to)	99-103
Number of pages	5
Journal	Journal of Electron Microscopy
Volume	51
Issue number	2
DOIs	https://doi.org/10.1093/jmicro/51.2.99
State	Published - 2002

Keywords

Bond length
EELS
ELNES
Perovskite-type manganites
Resonance effects

ASJC Scopus subject areas

Instrumentation

Online availability

10.1093/jmicro/51.2.99

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@article{4bf0df846d304601a1a1f702b63ba1be,

title = "Resonance effect in ELNES from perovskite-type manganites BiMnO3 and LaMnO3",

abstract = "Fine structures in electron energy-loss spectra, observed 30-40 eV beyond the threshold of oxygen K-edges in perovskite-type manganites BiMnO3 and LaMnO3, are discussed. LaMnO3 with orthorhombic symmetry (space group Pbnm) shows a clear peak in this region. However, BiMnO3 with a heavily distorted perovskite-type structure (monoclinic, space group C2) does not show an appreciable peak. It is demonstrated that peaks in this energy region arise from the resonance effect of ejected core electrons and that the shape is sensitive to the environment of neighbouring oxygen atoms in the perovskite-type structures.",

keywords = "Bond length, EELS, ELNES, Perovskite-type manganites, Resonance effects",

author = "Yasukazu Murakami and Daisuke Shindo and Masae Kikuchi and Zuo, {Jianm Min} and Spence, {John C.H.}",

note = "Funding Information: The authors are grateful to Dr T. Atou at Tohoku University for useful discussion on the crystal structure of BiMnO3and Dr Bin Jiang at Arizona State University for his collaboration. This work was partly supported by the Grant-in-Aid for Scientific Research on Priority Area and for Encouragement of Young Scientists (Y. Murakami) from the Ministry of Education, Culture, Sports, Science and Technology of Japan, and NSF grant number DMR9973894.",

year = "2002",

doi = "10.1093/jmicro/51.2.99",

language = "English (US)",

volume = "51",

pages = "99--103",

journal = "Journal of Electron Microscopy",

issn = "0022-0744",

publisher = "Japanese Society of Microscopy",

number = "2",

}

TY - JOUR

T1 - Resonance effect in ELNES from perovskite-type manganites BiMnO3 and LaMnO3

AU - Murakami, Yasukazu

AU - Shindo, Daisuke

AU - Kikuchi, Masae

AU - Zuo, Jianm Min

AU - Spence, John C.H.

N1 - Funding Information: The authors are grateful to Dr T. Atou at Tohoku University for useful discussion on the crystal structure of BiMnO3and Dr Bin Jiang at Arizona State University for his collaboration. This work was partly supported by the Grant-in-Aid for Scientific Research on Priority Area and for Encouragement of Young Scientists (Y. Murakami) from the Ministry of Education, Culture, Sports, Science and Technology of Japan, and NSF grant number DMR9973894.

PY - 2002

Y1 - 2002

N2 - Fine structures in electron energy-loss spectra, observed 30-40 eV beyond the threshold of oxygen K-edges in perovskite-type manganites BiMnO3 and LaMnO3, are discussed. LaMnO3 with orthorhombic symmetry (space group Pbnm) shows a clear peak in this region. However, BiMnO3 with a heavily distorted perovskite-type structure (monoclinic, space group C2) does not show an appreciable peak. It is demonstrated that peaks in this energy region arise from the resonance effect of ejected core electrons and that the shape is sensitive to the environment of neighbouring oxygen atoms in the perovskite-type structures.

AB - Fine structures in electron energy-loss spectra, observed 30-40 eV beyond the threshold of oxygen K-edges in perovskite-type manganites BiMnO3 and LaMnO3, are discussed. LaMnO3 with orthorhombic symmetry (space group Pbnm) shows a clear peak in this region. However, BiMnO3 with a heavily distorted perovskite-type structure (monoclinic, space group C2) does not show an appreciable peak. It is demonstrated that peaks in this energy region arise from the resonance effect of ejected core electrons and that the shape is sensitive to the environment of neighbouring oxygen atoms in the perovskite-type structures.

KW - Bond length

KW - EELS

KW - ELNES

KW - Perovskite-type manganites

KW - Resonance effects

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JO - Journal of Electron Microscopy

JF - Journal of Electron Microscopy

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