Spin dynamics of the ferromagnetic transition in iron mixed-valence complexes, (n-CnH2n+1)4N[FeIIFeIII(dto)3] (dto=C2O2S2, n=3-5) by μSR

Masaya Enomoto; Noriyuki Kida; Isao Watanabe; Takao Suzuki; Norimichi Kojima

doi:10.1016/j.physb.2008.11.117

Spin dynamics of the ferromagnetic transition in iron mixed-valence complexes, (n-C_nH_2n+1)₄N[Fe^IIFe^III(dto)₃] (dto=C₂O₂S₂, n=3-5) by μSR

Masaya Enomoto, Noriyuki Kida, Isao Watanabe, Takao Suzuki, Norimichi Kojima

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

5 Citations (Scopus)

Abstract

We have investigated the ferromagnetic transition in iron mixed-valence complexes, (n-C_nH_2n+1)₄N[Fe^IIFe^III(dto)₃] (dto=C₂O₂S₂, n=3-5) by means of μSR measurements. The sharp drop of initial asymmetry and the strong enhancement of depolarization rate around 20 K prove the development of the ferromagnetic ordering state in n=3-5. Moreover, the decoupling process by the longitudinal-field muon spin relaxation (μSR) shows the existence of strong internal magnetic field for all the complexes. On the other hand, there are not any muon spin precession signals in high-resolution time spectra, which suggests the existence of disorder in the ferromagnetic ordering state for these complexes.

Original language	English
Pages (from-to)	642-644
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	404
Issue number	5-7
DOIs	https://doi.org/10.1016/j.physb.2008.11.117
Publication status	Published - 2009 Apr 15
Externally published	Yes

Keywords

Ferromagnetism
Iron mixed-valence complex

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2008.11.117

Cite this

@article{d5ff445666c8486993db9077fcf8c2c9,

title = "Spin dynamics of the ferromagnetic transition in iron mixed-valence complexes, (n-CnH2n+1)4N[FeIIFeIII(dto)3] (dto=C2O2S2, n=3-5) by μSR",

abstract = "We have investigated the ferromagnetic transition in iron mixed-valence complexes, (n-CnH2n+1)4N[FeIIFeIII(dto)3] (dto=C2O2S2, n=3-5) by means of μSR measurements. The sharp drop of initial asymmetry and the strong enhancement of depolarization rate around 20 K prove the development of the ferromagnetic ordering state in n=3-5. Moreover, the decoupling process by the longitudinal-field muon spin relaxation (μSR) shows the existence of strong internal magnetic field for all the complexes. On the other hand, there are not any muon spin precession signals in high-resolution time spectra, which suggests the existence of disorder in the ferromagnetic ordering state for these complexes.",

keywords = "Ferromagnetism, Iron mixed-valence complex",

author = "Masaya Enomoto and Noriyuki Kida and Isao Watanabe and Takao Suzuki and Norimichi Kojima",

note = "Funding Information: We are grateful to the staff of the PSI muon group for technical support. The μSR measurements were supported by the KEK-MSL Inter-University Program for Oversea Muon Facilities and a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan.",

year = "2009",

month = apr,

day = "15",

doi = "10.1016/j.physb.2008.11.117",

language = "English",

volume = "404",

pages = "642--644",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

number = "5-7",

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TY - JOUR

T1 - Spin dynamics of the ferromagnetic transition in iron mixed-valence complexes, (n-CnH2n+1)4N[FeIIFeIII(dto)3] (dto=C2O2S2, n=3-5) by μSR

AU - Enomoto, Masaya

AU - Kida, Noriyuki

AU - Watanabe, Isao

AU - Suzuki, Takao

AU - Kojima, Norimichi

N1 - Funding Information: We are grateful to the staff of the PSI muon group for technical support. The μSR measurements were supported by the KEK-MSL Inter-University Program for Oversea Muon Facilities and a Grant-in-Aid for Scientific Research from the Ministry of Education, Science, Sports and Culture, Japan.

PY - 2009/4/15

Y1 - 2009/4/15

N2 - We have investigated the ferromagnetic transition in iron mixed-valence complexes, (n-CnH2n+1)4N[FeIIFeIII(dto)3] (dto=C2O2S2, n=3-5) by means of μSR measurements. The sharp drop of initial asymmetry and the strong enhancement of depolarization rate around 20 K prove the development of the ferromagnetic ordering state in n=3-5. Moreover, the decoupling process by the longitudinal-field muon spin relaxation (μSR) shows the existence of strong internal magnetic field for all the complexes. On the other hand, there are not any muon spin precession signals in high-resolution time spectra, which suggests the existence of disorder in the ferromagnetic ordering state for these complexes.

AB - We have investigated the ferromagnetic transition in iron mixed-valence complexes, (n-CnH2n+1)4N[FeIIFeIII(dto)3] (dto=C2O2S2, n=3-5) by means of μSR measurements. The sharp drop of initial asymmetry and the strong enhancement of depolarization rate around 20 K prove the development of the ferromagnetic ordering state in n=3-5. Moreover, the decoupling process by the longitudinal-field muon spin relaxation (μSR) shows the existence of strong internal magnetic field for all the complexes. On the other hand, there are not any muon spin precession signals in high-resolution time spectra, which suggests the existence of disorder in the ferromagnetic ordering state for these complexes.

KW - Ferromagnetism

KW - Iron mixed-valence complex

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