Magnetic dilution effect on the charge transfer phase transition and the ferromagnetic transition for an iron mixed-valence complex, (n-C3H7)4N[FeII1−xZnIIxFeIII(dto)3] (dto=C2O2S2)

Polyhedron ◽  
2009 ◽  
Vol 28 (9-10) ◽  
pp. 1826-1829 ◽  
Author(s):  
Masaya Enomoto ◽  
Norimichi Kojima
Keyword(s):  
Phase Transition ◽  
Charge Transfer ◽  
Mixed Valence ◽  
Dilution Effect ◽  
Ferromagnetic Transition ◽  
Transfer Phase ◽  
Magnetic Dilution ◽  
Mixed Valence Complex

scholarly journals Effect of Transition Metal Substitution on the Charge-Transfer Phase Transition and Ferromagnetism of Dithiooxalato-Bridged Hetero Metal Complexes, (n-C3H7)4N[FeII1−xMnIIxFeIII(dto)3]

Crystals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 446 ◽  
Author(s):  
Masaya Enomoto ◽  
Hiromichi Ida ◽  
Atsushi Okazawa ◽  
Norimichi Kojima
Keyword(s):  
Phase Transition ◽  
Charge Transfer ◽  
Physical Properties ◽  
Mixed Valence ◽  
Ferromagnetic Phase ◽  
Ferromagnetic Transition ◽  
Transfer Phase ◽  
Spin Configuration ◽  
Ion Radius ◽  
The Difference

The dithiooxalato-bridged iron mixed-valence complex (n-C3H7)4N[FeIIFeIII(dto)3] (dto = dithiooxalato) undergoes a novel charge-transfer phase transition (CTPT) accompanied by electron transfer between adjacent FeII and FeIII sites. The CTPT influences the ferromagnetic transition temperature according to the change of spin configuration on the iron sites. To reveal the mechanism of the CTPT, we have synthesized the series of metal-substituted complexes (n-C3H7)4N[FeII1-xMnIIxFeIII(dto)3] (x = 0–1) and investigated their physical properties by means of magnetic susceptibility and dielectric constant measurements. With increasing MnII concentration, x, MnII-substituted complexes show the disappearance of CTPT above x = 0.04, while the ferromagnetic phase remains in the whole range of x. These results are quite different from the physical properties of the ZnII-substituted complex, (n-C3H7)4N[FeII1-xZnIIxFeIII(dto)3], which is attributed to the difference of ion radius as well as the spin states of MnII and ZnII.

Effect of Nonmagnetic Substitution on the Magnetic Properties and Charge-Transfer Phase Transition of an Iron Mixed-Valence Complex, (n-C3H7)4N[FeIIFeIII(dto)3] (dto = C2O2S2)

2012 ◽  
Vol 51 (16) ◽  
pp. 8989-8996 ◽  
Author(s):  
Hiromichi Ida ◽  
Atsushi Okazawa ◽  
Norimichi Kojima ◽  
Ryo Shimizu ◽  
Yasuhiro Yamada ◽  
...  
Keyword(s):  
Phase Transition ◽  
Magnetic Properties ◽  
Charge Transfer ◽  
Mixed Valence ◽  
Transfer Phase ◽  
Mixed Valence Complex

Charge-Transfer Phase Transition and Ferromagnetism of Iron Mixed-Valence Complexes (n-CnH2n+1)4N[FeIIFeIII(dto)3] (n = 3–6; dto = C2O2S2)

2006 ◽  
Vol 2006 (6) ◽  
pp. 1198-1207 ◽  
Author(s):  
Miho Itoi ◽  
Yuuki Ono ◽  
Norimichi Kojima ◽  
Kenichi Kato ◽  
Keiichi Osaka ◽  
...  
Keyword(s):  
Phase Transition ◽  
Charge Transfer ◽  
Mixed Valence ◽  
Transfer Phase

Charge transfer phase transition and ferromagnetism in a mixed-valence iron complex, (n-C3H7)4N[FeIIFeIII(dto)3] (dto=C2O2S2)

2001 ◽  
Vol 120 (4) ◽  
pp. 165-170 ◽  
Author(s):  
N. Kojima ◽  
W. Aoki ◽  
M. Itoi ◽  
Y. Ono ◽  
M. Seto ◽  
...  
Keyword(s):  
Phase Transition ◽  
Charge Transfer ◽  
Mixed Valence ◽  
Iron Complex ◽  
Transfer Phase
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