Study on the ferromagnetic state in iron mixed-valence complexes, A[Fe IIFe III(dto) 3] (A = (n-C nH 2n+1) 4N; dto = C 2S 2O 2) by means of Mössbauer spectroscopy

Yuki Ono; Atsushi Okazawa; Masaya Enomoto; Norimichi Kojima

doi:10.1007/s10751-011-0406-5

Study on the ferromagnetic state in iron mixed-valence complexes, A[Fe ^IIFe ^III(dto) ₃] (A = (n-C _nH _2n+1) ₄N; dto = C ₂S ₂O ₂) by means of Mössbauer spectroscopy

Yuki Ono, Atsushi Okazawa, Masaya Enomoto, Norimichi Kojima^*

^*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

We have investigated the ferromagnetic states for (n-C _nH _{2n + 1}) ₄N[Fe ^IIFe ^III(dto) ₃] (n = 3-6; dto = C ₂O ₂S ₂) by means of ⁵⁷Fe Mössbauer spectroscopy. The major component of the spin configuration in the ferromagnetic states for n = 3 and 4 is the low-temperature phase (LTP) with the Fe ^III (S = 5/2) and Fe ^II (S = 0) states. The high-temperature phase (HTP) of n = 4 remains by more than 20%, which is consistent with two ferromagnetic transitions (T _C = 7 & 13 K). Moreover, it was revealed that the Mössbauer spectra in the ferromagnetic states for n = 5 and 6 correspond to the HTP consisting of the Fe ^II (S = 2) and Fe ^III (S = 1/2) states.

Original language	English
Pages (from-to)	139-143
Number of pages	5
Journal	Hyperfine Interactions
Volume	207
Issue number	1-3
DOIs	https://doi.org/10.1007/s10751-011-0406-5
Publication status	Published - 2012 Mar
Externally published	Yes

Keywords

Dithiooxalato
Ferromagnetism
Mixed-valence complex
Mössbauer spectroscopy

ASJC Scopus subject areas

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

Access to Document

10.1007/s10751-011-0406-5

Cite this

@article{210c09adca6b4ac5b73ff8bc39d9fe40,

title = "Study on the ferromagnetic state in iron mixed-valence complexes, A[Fe IIFe III(dto) 3] (A = (n-C nH 2n+1) 4N; dto = C 2S 2O 2) by means of M{\"o}ssbauer spectroscopy",

abstract = "We have investigated the ferromagnetic states for (n-C nH 2n + 1) 4N[Fe IIFe III(dto) 3] (n = 3-6; dto = C 2O 2S 2) by means of 57Fe M{\"o}ssbauer spectroscopy. The major component of the spin configuration in the ferromagnetic states for n = 3 and 4 is the low-temperature phase (LTP) with the Fe III (S = 5/2) and Fe II (S = 0) states. The high-temperature phase (HTP) of n = 4 remains by more than 20%, which is consistent with two ferromagnetic transitions (T C = 7 & 13 K). Moreover, it was revealed that the M{\"o}ssbauer spectra in the ferromagnetic states for n = 5 and 6 correspond to the HTP consisting of the Fe II (S = 2) and Fe III (S = 1/2) states.",

keywords = "Dithiooxalato, Ferromagnetism, Mixed-valence complex, M{\"o}ssbauer spectroscopy",

author = "Yuki Ono and Atsushi Okazawa and Masaya Enomoto and Norimichi Kojima",

note = "Funding Information: Acknowledgements This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Educational Science, Sports and Culture, Japan.",

year = "2012",

month = mar,

doi = "10.1007/s10751-011-0406-5",

language = "English",

volume = "207",

pages = "139--143",

journal = "Hyperfine Interaction",

issn = "0304-3843",

publisher = "Springer Netherlands",

number = "1-3",

}

TY - JOUR

T1 - Study on the ferromagnetic state in iron mixed-valence complexes, A[Fe IIFe III(dto) 3] (A = (n-C nH 2n+1) 4N; dto = C 2S 2O 2) by means of Mössbauer spectroscopy

AU - Ono, Yuki

AU - Okazawa, Atsushi

AU - Enomoto, Masaya

AU - Kojima, Norimichi

N1 - Funding Information: Acknowledgements This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Educational Science, Sports and Culture, Japan.

PY - 2012/3

Y1 - 2012/3

N2 - We have investigated the ferromagnetic states for (n-C nH 2n + 1) 4N[Fe IIFe III(dto) 3] (n = 3-6; dto = C 2O 2S 2) by means of 57Fe Mössbauer spectroscopy. The major component of the spin configuration in the ferromagnetic states for n = 3 and 4 is the low-temperature phase (LTP) with the Fe III (S = 5/2) and Fe II (S = 0) states. The high-temperature phase (HTP) of n = 4 remains by more than 20%, which is consistent with two ferromagnetic transitions (T C = 7 & 13 K). Moreover, it was revealed that the Mössbauer spectra in the ferromagnetic states for n = 5 and 6 correspond to the HTP consisting of the Fe II (S = 2) and Fe III (S = 1/2) states.

AB - We have investigated the ferromagnetic states for (n-C nH 2n + 1) 4N[Fe IIFe III(dto) 3] (n = 3-6; dto = C 2O 2S 2) by means of 57Fe Mössbauer spectroscopy. The major component of the spin configuration in the ferromagnetic states for n = 3 and 4 is the low-temperature phase (LTP) with the Fe III (S = 5/2) and Fe II (S = 0) states. The high-temperature phase (HTP) of n = 4 remains by more than 20%, which is consistent with two ferromagnetic transitions (T C = 7 & 13 K). Moreover, it was revealed that the Mössbauer spectra in the ferromagnetic states for n = 5 and 6 correspond to the HTP consisting of the Fe II (S = 2) and Fe III (S = 1/2) states.

KW - Dithiooxalato

KW - Ferromagnetism

KW - Mixed-valence complex

KW - Mössbauer spectroscopy

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DO - 10.1007/s10751-011-0406-5

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JF - Hyperfine Interaction

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