Study on the ferromagnetic state in iron mixed-valence complexes, A[FeIIFeIII(dto)3] (A = (n-CnH2n + 1)4N; dto = C2S2O2) by means of Mössbauer spectroscopy

被引：0
|
作者：
Yuki Ono
Atsushi Okazawa
Masaya Enomoto
Norimichi Kojima
机构：
[1] The University of Tokyo,Graduate School of Arts and Sciences
[2] Tokyo University of Science,Department of Chemistry, Faculty of Science Division I
来源：
Hyperfine Interactions | 2012年 / 207卷
关键词：
Mixed-valence complex; Dithiooxalato; Ferromagnetism; Mössbauer spectroscopy;
D O I：
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学科分类号：
摘要：
We have investigated the ferromagnetic states for (n-CnH2n + 1)4N[FeIIFeIII(dto)3] (n = 3–6; dto = C2O2S2) 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 FeIII (S = 5/2) and FeII (S = 0) states. The high-temperature phase (HTP) of n = 4 remains by more than 20%, which is consistent with two ferromagnetic transitions (TC = 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 FeII (S = 2) and FeIII (S = 1/2) states.
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页码：139 / 143
页数：4
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