We have studied the low-spin to high spin state phase transition induced by a single or a sequence of nanosecond laser pulses within the thermal hysteresis loop of the [Fe(NH2-trz)3](NO3)2-H2O spin crossover compound. We demonstrate that the final state that is photoinduced can be finely controlled by changing the central wavelength and the energy of the laser pulses. A simple model accounts for the observed phenomena and paves the way for the practical applications to optical data storage at room temperature of spin state transition compounds.

1.
Spin Crossover in Transition Metal Compounds I-III
,
Topics in Current Chemistry
, edited by
P.
Gütlich
and
H. A.
Goodwin
(
Springer
,
NewYork
,
2004
), Vol.
233–235
.
2.
O.
Kahn
and
C.
Jay Martinez
,
Science
279
,
44
(
1998
).
3.
P.
Gütlich
,
Y.
Garcia
, and
T.
Woike
,
Coord. Chem. Rev.
219
,
839
(
2001
).
4.
J. -F.
Létard
,
P.
Guionneau
, and
L.
Goux-Capes
Topics in Current Chemistry
, Eds.
P.
Gütlich
and
H. A.
Goodwin
(
Springer
,
New York
,
2004
), Vol.
235
, p.
221
.
5.
S.
Decurtins
,
P.
Gütlich
,
C. P.
Köher
,
H.
Spiering
, and
A.
Hauser
,
Chem. Phys. Lett.
105
,
1
(
1984
).
6.
A.
Hauser
,
Chem. Phys. Lett.
124
,
543
(
1986
).
7.
J. -F.
Létard
,
P.
Guionneau
,
O.
Nguyen
,
J. S.
Costa
,
S.
Marcen
,
G.
Chastanet
,
M.
Marchivie
, and
L.
Goux-Capes
,
Chemistry
11
,
4582
(
2005
).
8.
J. -F.
Létard
,
J. Mater. Chem.
16
,
2550
(
2006
).
9.
E.
Freysz
,
S.
Montant
,
S.
Létard
, and
J. -F.
Létard
,
Chem. Phys. Lett.
394
,
318
(
2004
).
10.
A.
Hauser
,
R.
Hinek
,
H.
Spiering
, and
P.
Gütlich
,
Chemistry
2
,
1435
(
2006
).
11.
S.
Bonhommeau
,
G.
Molnár
,
A.
Galet
,
A.
Zwick
,
J. -A.
Real
,
J. J.
McGarvey
, and
A.
Bousseksou
,
Angew. Chem., Int. Ed.
44
,
4096
(
2005
).
12.
O.
Fouché
,
J.
Degert
,
G.
Jonusauskas
,
C.
Baldé
,
C.
Desplanche
,
J. -F.
Létard
, and
E.
Freysz
,
Chem. Phys. Lett.
469
,
274
(
2009
).
13.
M.
Lorenc
,
J.
Hebert
,
N.
Moisan
,
E.
Trzop
,
M.
Servol
,
M.
Buron-Le Cointe
,
H.
Cailleau
,
M. -L.
Boillot
,
E.
Pontecorvo
,
W.
Wulff
,
S.
Koshihara
, and
E.
Collet
,
Phys. Rev. Lett.
103
,
028301
(
2009
).
14.
A.
Hauser
,
J. Chem. Phys.
94
,
2741
(
1991
).
15.
O.
Fouché
,
J.
Degert
,
G.
Jonusauskas
,
N.
Daro
,
J. -F.
Létard
, and
E.
Freysz
,
Phys. Chem. Chem. Phys.
(unpublished).
16.
L. G.
Lavrenova
,
V. N.
Ikorskii
,
V. A.
Varnek
,
I. M.
Oglezneva
, and
S. V.
Larionov
,
Koord. Khim.
12
,
207
(
1986
).
17.
In agreement with thermogravimetric experiments, the elemental analysis performed on the powder is consistent with the presence of one molecule of water. Anal. Calculated [Fe(NH2-trz)3](NO3)21H2O:C, 16.01; H, 3.14; N, 43.57; Fe, 12.41; Found: C, 16.13; H, 2.94; N, 43.80; Fe, 12.07.
18.
E. D.
Loutete-Dangui
,
F.
Varret
,
E.
Codjovi
,
P. R.
Dahoo
,
H.
Tokoro
,
S.
Ohkoshi
,
C.
Eypert
,
J. -F.
Létard
,
J. M.
Coanga
, and
K.
Boukheddaden
,
Phys. Rev. B
75
,
184425
(
2007
).
You do not currently have access to this content.