Electric-Field-Induced Charge-Transfer Phase Transition: A Promising Approach Toward Electrically Switchable Devices

Much research was directed toward the development of elec. switchable optical materials for applications in memory and display devices. Exptl. evidence is presented for an elec.-field-induced charge-transfer phase transition in 2 cyanometalate complexes: Rb0.8Mn[Fe(CN)6]0.93·1.62H2O and Co3[W(CN)8]2(pyrimidine)4·6H2O, involving changes in their magnetic, optical, and electronic properties as well. Application of an elec. field above a threshold value and within the thermal hysteresis region leads to a transition from the high- to the low-temperature phase in these compounds A model is proposed to explain the main observations from a para-ferroelec. transition. Probably this new concept of elec. switching, based on materials exhibiting charge-transfer phase transitions with large thermal hysteresis loops, may open up doors for novel electrooptical devices.

Références

Titre
Electric-Field-Induced Charge-Transfer Phase Transition: A Promising Approach Toward Electrically Switchable Devices
Type de publication
Article de revue
Année de publication
2009
Revue
J. Am. Chem. Soc.
Volume
131
Pagination
15049–15054
ISSN
0002-7863
Soumis le 26 juin 2018