ic060034t_si_001.cif (16 kB)
Magnetoresistance Effects Evidencing the π−d Interaction in Metallic Organic Conductors, (EDT-DSDTFVO)2•MX4 (M = Fe, Ga; X = Cl, Br)
dataset
posted on 2006-07-24, 00:00 authored by Hideki Fujiwara, Toshiki Hayashi, Toyonari Sugimoto, Hiroyuki Nakazumi, Satoru Noguchi, Lin Li, Keiichi Yokogawa, Syuma Yasuzuka, Keizo Murata, Takehiko MoriThe 2:1 salts of a new donor molecule, EDT-DSDTFVO with MX4-
(M = Fe, Ga; X = Cl, Br) ions, were prepared. The crystal
structures of the donor molecules had a β-type packing motif. All
the salts essentially exhibited metallic behaviors despite the small
upturns in the resistances below 30−70 K. A large negative
magnetoresistance (MR) effect [−14.7% (ρ⊥) at 4.0 K and 5 T]
was observed in the FeCl4- salt, while a positive MR effect [+4.0%
(ρ⊥) at 4.0 K and 5 T] was observed in the GaCl4- salt, suggesting
that there is a π−d interaction in the FeCl4- salt. The pressure
application suppressed the resistivity upturns, increased the
negative MR effect (−17.7% at 9.5 kbar) in the FeCl4- salt, and
decreased the positive MR effect (+3.3% at 15 kbar) in the GaCl4-
salt.