Determination of valence state of Mn ions in Pr 1-xA xMnO 3-δ (A = Ca, Sr) by Mn-L 3 X-ray absorption near-edge structure analysis

Haruto Kanamori; Tsuyoshi Yoshioka; Kazuyuki Hirose; Tomoyuki Yamamoto

doi:10.1016/j.elspec.2012.03.003

Determination of valence state of Mn ions in Pr _1-xA _xMnO _3-δ (A = Ca, Sr) by Mn-L ₃ X-ray absorption near-edge structure analysis

Haruto Kanamori, Tsuyoshi Yoshioka, Kazuyuki Hirose, Tomoyuki Yamamoto^*

^*Corresponding author for this work

School of Fundamental Science and Engineering

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

4 Citations (Scopus)

Abstract

The valence states of the Mn ions in Pr _1-xA _xMnO _3-δ (A = Ca, Sr) are investigated by Mn-L ₃ X-ray absorption near-edge structure (XANES) analysis. The spectral fine structures in the Mn-L ₃ XANES analysis show a significant difference between Pr _0.5Ca _0.5MnO _3-δ and Pr _0.5Sr _0.5MnO _3-δ, a paramagnetic insulator and a ferromagnetic metal, respectively, at room temperature, whereas the spectral structures of Pr _0.7Ca _0.3MnO _3-δ and Pr _0.7Sr _0.3MnO _3-δ, paramagnetic insulators, are almost identical. These results indicate that the valence states of the Mn ions in these materials are highly correlated with their magnetic and electrical properties. A significant difference was also found between the Mn-L ₃ XANES profiles of Pr _1-xCa _xMnO _3-δ and the profiles formed by the linear combination of the Mn-L ₃ XANES spectra of PrMnO ₃ (Mn ³⁺) and CaMnO ₃ (Mn ⁴⁺). This difference indicates that the Mn ions in these materials do not have a mixed-valence state of 3+ and 4+, but have an intermediate valence state o 3+ and 4+.

Original language	English
Pages (from-to)	129-132
Number of pages	4
Journal	Journal of Electron Spectroscopy and Related Phenomena
Volume	185
Issue number	5-7
DOIs	https://doi.org/10.1016/j.elspec.2012.03.003
Publication status	Published - 2012 Aug 1

Keywords

Electrical conductivity
Magnetic property
Perovskite manganite
Valence state
X-ray absorption spectrum

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Radiation
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry

Access to Document

10.1016/j.elspec.2012.03.003

Cite this

@article{69c5107bfe2b4f0eae6823a7ed5adf0b,

title = "Determination of valence state of Mn ions in Pr 1-xA xMnO 3-δ (A = Ca, Sr) by Mn-L 3 X-ray absorption near-edge structure analysis",

abstract = "The valence states of the Mn ions in Pr 1-xA xMnO 3-δ (A = Ca, Sr) are investigated by Mn-L 3 X-ray absorption near-edge structure (XANES) analysis. The spectral fine structures in the Mn-L 3 XANES analysis show a significant difference between Pr 0.5Ca 0.5MnO 3-δ and Pr 0.5Sr 0.5MnO 3-δ, a paramagnetic insulator and a ferromagnetic metal, respectively, at room temperature, whereas the spectral structures of Pr 0.7Ca 0.3MnO 3-δ and Pr 0.7Sr 0.3MnO 3-δ, paramagnetic insulators, are almost identical. These results indicate that the valence states of the Mn ions in these materials are highly correlated with their magnetic and electrical properties. A significant difference was also found between the Mn-L 3 XANES profiles of Pr 1-xCa xMnO 3-δ and the profiles formed by the linear combination of the Mn-L 3 XANES spectra of PrMnO 3 (Mn 3+) and CaMnO 3 (Mn 4+). This difference indicates that the Mn ions in these materials do not have a mixed-valence state of 3+ and 4+, but have an intermediate valence state o 3+ and 4+.",

keywords = "Electrical conductivity, Magnetic property, Perovskite manganite, Valence state, X-ray absorption spectrum",

author = "Haruto Kanamori and Tsuyoshi Yoshioka and Kazuyuki Hirose and Tomoyuki Yamamoto",

year = "2012",

month = aug,

day = "1",

doi = "10.1016/j.elspec.2012.03.003",

language = "English",

volume = "185",

pages = "129--132",

journal = "Journal of Electron Spectroscopy and Related Phenomena",

issn = "0368-2048",

publisher = "Elsevier",

number = "5-7",

}

TY - JOUR

T1 - Determination of valence state of Mn ions in Pr 1-xA xMnO 3-δ (A = Ca, Sr) by Mn-L 3 X-ray absorption near-edge structure analysis

AU - Kanamori, Haruto

AU - Yoshioka, Tsuyoshi

AU - Hirose, Kazuyuki

AU - Yamamoto, Tomoyuki

PY - 2012/8/1

Y1 - 2012/8/1

N2 - The valence states of the Mn ions in Pr 1-xA xMnO 3-δ (A = Ca, Sr) are investigated by Mn-L 3 X-ray absorption near-edge structure (XANES) analysis. The spectral fine structures in the Mn-L 3 XANES analysis show a significant difference between Pr 0.5Ca 0.5MnO 3-δ and Pr 0.5Sr 0.5MnO 3-δ, a paramagnetic insulator and a ferromagnetic metal, respectively, at room temperature, whereas the spectral structures of Pr 0.7Ca 0.3MnO 3-δ and Pr 0.7Sr 0.3MnO 3-δ, paramagnetic insulators, are almost identical. These results indicate that the valence states of the Mn ions in these materials are highly correlated with their magnetic and electrical properties. A significant difference was also found between the Mn-L 3 XANES profiles of Pr 1-xCa xMnO 3-δ and the profiles formed by the linear combination of the Mn-L 3 XANES spectra of PrMnO 3 (Mn 3+) and CaMnO 3 (Mn 4+). This difference indicates that the Mn ions in these materials do not have a mixed-valence state of 3+ and 4+, but have an intermediate valence state o 3+ and 4+.

AB - The valence states of the Mn ions in Pr 1-xA xMnO 3-δ (A = Ca, Sr) are investigated by Mn-L 3 X-ray absorption near-edge structure (XANES) analysis. The spectral fine structures in the Mn-L 3 XANES analysis show a significant difference between Pr 0.5Ca 0.5MnO 3-δ and Pr 0.5Sr 0.5MnO 3-δ, a paramagnetic insulator and a ferromagnetic metal, respectively, at room temperature, whereas the spectral structures of Pr 0.7Ca 0.3MnO 3-δ and Pr 0.7Sr 0.3MnO 3-δ, paramagnetic insulators, are almost identical. These results indicate that the valence states of the Mn ions in these materials are highly correlated with their magnetic and electrical properties. A significant difference was also found between the Mn-L 3 XANES profiles of Pr 1-xCa xMnO 3-δ and the profiles formed by the linear combination of the Mn-L 3 XANES spectra of PrMnO 3 (Mn 3+) and CaMnO 3 (Mn 4+). This difference indicates that the Mn ions in these materials do not have a mixed-valence state of 3+ and 4+, but have an intermediate valence state o 3+ and 4+.

KW - Electrical conductivity

KW - Magnetic property

KW - Perovskite manganite

KW - Valence state

KW - X-ray absorption spectrum

UR - http://www.scopus.com/inward/record.url?scp=84863708214&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863708214&partnerID=8YFLogxK

U2 - 10.1016/j.elspec.2012.03.003

DO - 10.1016/j.elspec.2012.03.003

M3 - Article

AN - SCOPUS:84863708214

SN - 0368-2048

VL - 185

SP - 129

EP - 132

JO - Journal of Electron Spectroscopy and Related Phenomena

JF - Journal of Electron Spectroscopy and Related Phenomena

IS - 5-7

ER -