Stable metallic behavior and antiferromagnetic ordering of Fe(III) d spins in (EDO-TTFVO)2.FeCl4.
We report the crystal structure and physical properties of the 2:1 FeCl4- salt of a new donor molecule, EDO-TTFVO. Crystal structure analysis of this salt revealed that the donor molecules formed a beta' '-type two-dimensional conducting layer, and there is a short S...Cl contact between the donor molecules and the FeCl4- ions, which is expected to mediate a strong pi-d interaction. This salt showed a stable metallic conducting behavior down to 0.3 K and an antiferromagnetic ordering at TN approximately 3.0 K, indicating that this salt becomes a new antiferromagnetic molecular metal at ambient pressure. The appearance of the magnetic ordering is considered to originate from the strong pi-d interactions between the donor molecules and the FeCl4- ions because the field dependence of magnetoresistances was remarkably affected below the antiferromagnetic transition temperature.
Fujiwara
Hideki
H
Department of Chemistry, Osaka Prefecture University, Osaka 599-8570, Japan. hfuji@c.s.osakafu-u.ac.jp
Wada
Kenji
K
Hiraoka
Takashi
T
Hayashi
Toshiki
T
Sugimoto
Toyonari
T
Nakazumi
Hiroyuki
H
Yokogawa
Keiichi
K
Teramura
Masayasu
M
Yasuzuka
Syuma
S
Murata
Keizo
K
Mori
Takehiko
T
D018360:Crystallography, X-Ray; D005290:Ferric Compounds / Q000737:chemistry*; D006574:Heterocyclic Compounds, 2-Ring / Q000737:chemistry*; D008280:Magnetics; D008958:Models, Molecular; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000737:chemistry*; D011809:Quinones / Q000737:chemistry*; D013696:Temperature
D005290:Ferric Compounds; D006574:Heterocyclic Compounds, 2-Ring; D009942:Organometallic Compounds; D011809:Quinones; C507191:ethylenedioxyotetrathiafulvalenoquinone-1,3-dithiolemethide; C507189:ethylenedithiotetrathiafulvalenoquinone-1,3-dithiolemethide