Gawali-Salunke S, Varret F, Maurin I, Enachescu C, Malarova M, Boukheddaden K, Codjovi E, Tokoro H, Ohkoshi S, Hashimoto K. Magnetic and Mössbauer Investigation of the Photomagnetic Prussian Blue Analogue Na0.32Co[Fe(CN)6]0.74·3.4H2O: Cooperative Relaxation of the Thermally Quenched State.
J Phys Chem B 2005;
109:8251-6. [PMID:
16851964 DOI:
10.1021/jp044739x]
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Abstract
Thanks to thermal quenching we investigated the relaxation of the metastable state of Na(0.32)Co[Fe(CN)6](0.74).3.4H2O at low temperature. A self-accelerated process has been observed in agreement with the cooperative character of the system, responsible for the large thermal hysteresis of the charge-transfer-induced spin transition. The mean-field analysis of the relaxation is discussed with respect to the equilibrium properties. A sizable deviation from mean-field behavior is observed at the beginning of the relaxation process, which might be attributed to a preliminary structural relaxation of the quenched state.
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