Observation of the charge order in perovskite manganite Pr 0.5Ca 0.5MnO 3 by Mössbauer quadrupole effect

Shin Nakamura; Akio Fuwa; Yorihiko Tsunoda

doi:10.1007/s10751-011-0483-5

Observation of the charge order in perovskite manganite Pr _0.5Ca _0.5MnO ₃ by Mössbauer quadrupole effect

Shin Nakamura^*, Akio Fuwa, Yorihiko Tsunoda

^*Corresponding author for this work

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

7 Citations (Scopus)

Abstract

The charge order in a perovskite manganite Pr _0.5Ca _0.5MnO ₃ was investigated by Mössbauer spectroscopy. The quadrupole splitting and the absorption line width jump to an increase when lowering the temperature below 230 K (T _co), which is indicative of a phase transition to a monoclinic structure due to the charge ordering, or due to a local Jahn-Teller effect due to the presence of Mn ³⁺ ions. The intensity ratio of the doublet lines also changes at T _co. Local and dynamical Jahn-Teller effect (polarons) with a relaxation time of 10 ^-8 s is present even in the metallic state.

Original language	English
Pages (from-to)	29-32
Number of pages	4
Journal	Hyperfine Interactions
Volume	208
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-011-0483-5
Publication status	Published - 2012 Mar

Keywords

Fe Mössbauer spectroscopy
Charge order
Perovskite manganite
Pr Ca MnO
Quadrupole effect

ASJC Scopus subject areas

Condensed Matter Physics
Nuclear and High Energy Physics
Atomic and Molecular Physics, and Optics
Physical and Theoretical Chemistry

Access to Document

10.1007/s10751-011-0483-5

Cite this

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title = "Observation of the charge order in perovskite manganite Pr 0.5Ca 0.5MnO 3 by M{\"o}ssbauer quadrupole effect",

abstract = "The charge order in a perovskite manganite Pr 0.5Ca 0.5MnO 3 was investigated by M{\"o}ssbauer spectroscopy. The quadrupole splitting and the absorption line width jump to an increase when lowering the temperature below 230 K (T co), which is indicative of a phase transition to a monoclinic structure due to the charge ordering, or due to a local Jahn-Teller effect due to the presence of Mn 3+ ions. The intensity ratio of the doublet lines also changes at T co. Local and dynamical Jahn-Teller effect (polarons) with a relaxation time of 10 -8 s is present even in the metallic state.",

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author = "Shin Nakamura and Akio Fuwa and Yorihiko Tsunoda",

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T1 - Observation of the charge order in perovskite manganite Pr 0.5Ca 0.5MnO 3 by Mössbauer quadrupole effect

AU - Nakamura, Shin

AU - Fuwa, Akio

AU - Tsunoda, Yorihiko

PY - 2012/3

Y1 - 2012/3

N2 - The charge order in a perovskite manganite Pr 0.5Ca 0.5MnO 3 was investigated by Mössbauer spectroscopy. The quadrupole splitting and the absorption line width jump to an increase when lowering the temperature below 230 K (T co), which is indicative of a phase transition to a monoclinic structure due to the charge ordering, or due to a local Jahn-Teller effect due to the presence of Mn 3+ ions. The intensity ratio of the doublet lines also changes at T co. Local and dynamical Jahn-Teller effect (polarons) with a relaxation time of 10 -8 s is present even in the metallic state.

AB - The charge order in a perovskite manganite Pr 0.5Ca 0.5MnO 3 was investigated by Mössbauer spectroscopy. The quadrupole splitting and the absorption line width jump to an increase when lowering the temperature below 230 K (T co), which is indicative of a phase transition to a monoclinic structure due to the charge ordering, or due to a local Jahn-Teller effect due to the presence of Mn 3+ ions. The intensity ratio of the doublet lines also changes at T co. Local and dynamical Jahn-Teller effect (polarons) with a relaxation time of 10 -8 s is present even in the metallic state.

KW - Fe Mössbauer spectroscopy

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KW - Perovskite manganite

KW - Pr Ca MnO

KW - Quadrupole effect

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