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Four-wave-mixing in the Fe (II) spin-crossover system [Zn1-xFex(ptz)6](BF4)2 (ptz = 1-propyltetrazole)

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Published in Chemical Physics Letters. 1993, vol. 202, no. 1-2, p. 173-178
Abstract Making use of the phenomenon of light-induced spin-crossover in the [Zn1−xFex(ptz)6](BF4)2 spin-crossover system, very high diffraction efficiencies η can be achieved in non-degenerate four-wave-mixing. In the mixed crystal with x=0.1 and at 76 K, i.e. at a temperature where the system is predominantly in the low-spin state, a value for η of 43% was obtained. This is attributed to a phase grating due to the large difference in metal---ligand bondlength between the low-spin ground state and the light-induced high-spin state. The rate constant for the decay of the laser-induced grating as a function of temperature is found to be exactly twice the one of the high-spin→low-spin relaxation, as expected for a dilute system in the absence of cooperative effects.
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Research group Groupe Hauser
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HAUSER, Andreas. Four-wave-mixing in the Fe (II) spin-crossover system [Zn1-xFex(ptz)6](BF4)2 (ptz = 1-propyltetrazole). In: Chemical Physics Letters, 1993, vol. 202, n° 1-2, p. 173-178. https://archive-ouverte.unige.ch/unige:3024

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Deposited on : 2009-09-21

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