title: Stable metallic behavior and antiferromagnetic ordering of Fe(III) d spins in (EDO-TTFVO)2.FeCl4.
abstract: 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.
authors.affiliation: Department of Chemistry, Osaka Prefecture University, Osaka 599-8570, Japan. hfuji@c.s.osakafu-u.ac.jp
authors.forename: Hideki
authors.initials: H
authors.lastname: Fujiwara
authors.forename: Kenji
authors.initials: K
authors.lastname: Wada
authors.forename: Takashi
authors.initials: T
authors.lastname: Hiraoka
authors.forename: Toshiki
authors.initials: T
authors.lastname: Hayashi
authors.forename: Toyonari
authors.initials: T
authors.lastname: Sugimoto
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nakazumi
authors.forename: Keiichi
authors.initials: K
authors.lastname: Yokogawa
authors.forename: Masayasu
authors.initials: M
authors.lastname: Teramura
authors.forename: Syuma
authors.initials: S
authors.lastname: Yasuzuka
authors.forename: Keizo
authors.initials: K
authors.lastname: Murata
authors.forename: Takehiko
authors.initials: T
authors.lastname: Mori
mesh_terms: 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
chemical_list: D005290:Ferric Compounds; D006574:Heterocyclic Compounds, 2-Ring; D009942:Organometallic Compounds; D011809:Quinones; C507191:ethylenedioxyotetrathiafulvalenoquinone-1,3-dithiolemethide; C507189:ethylenedithiotetrathiafulvalenoquinone-1,3-dithiolemethide