Chemistry Reference
In-Depth Information
Figure
6.42. Magnetic
characterization
of
the
hybrid
material
[BEDT-
χ
(open circles) measured at
110 Hz. (b) Plot of
M
versus magnetic field at 2 K.
M
and
H
represent
M
and
B
, respectively. Reprinted with permission from Coronado
et al.
, 2000. Copyright
(2000) by the Nature Publishing Group.
χ
(filled circles) and
TTF]
3
[MnCr(C
2
O
4
)
3
]: (a)
γ
=
60
◦
. The BEDT-TTF cations are tilted with respect to the inorganic layer
by an angle of 45
◦
. The layers of BEDT-TTF are constructed by only one crystal-
lographically independent BEDT-TTF molecule located with the central carbon-
carbon double bond on an inversion centre. In this model the donor molecules adopt
the
.
66
-type packing while the inorganic oxalate-based bimetallic layer is crystallo-
graphically disordered.
The magnetic properties of this compound show that it is a ferromagnet below
T
C
β
5 K. In particular, ac magnetic measurements exhibit a sharp peak in the
in-phase signal (
5
.
χ
), accompanied by an out-of-phase signal (
χ
) below
T
C
as
