Light-induced thermal hysteresis

Several other light-induced phenomena associated with spin transition systems have recently been reported. These include light induced thermal hysteresis (LITH), which is another example of light induced bistability, discovered for the SCO compound [Fe(PMBiA)2(NCS)2] which undergoes a very abrupt thermal ST around 170 K with hysteresis [174]. Irradiation of the sample at 10 Kwith green light resulted in the population of the LIESST state. When the temperature was raised to 100 K and lowered back to 10 K under continuous irradiation a wide thermal hysteresis loop resulted. The... 

Light-induced excited spin state trapping Light-induced thermal hysteresis 4- (p-Methoxyphenyl)-1,2,4-triazole 4- (p-Tolyl) -1,2,4-triazole Pyridine... 

Enachescu C, Tanasa R, Stancu A, Varret F, Linares J, Codjovi E. First-order reversal curves analysis of rate-dependent hysteresis The example of light-induced thermal hysteresis in a spin-crossover solid. Physical Review B. 2005 72 054413(1)-054413(7). DOI 10.1103/PhysRevB.72.054413. 

A large number of different factors influence spin crossover. In addition to temperature-induced spin crossover, light-induced spin transition is also known this is the basis of the LIESST and reverse-LIESST effects, respectively. Of great interest is the utilisation of thermal hysteresis for data recording and construction of display units. 

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