Spin crossover micro and nanoparticles embedded in various
environments: an experimental and theoretical study
(Micro și nanoparticule cu tranzitie de spin încorporate in diverse medii:
studiu experimental si teoretic)

Financed by the Romanian National Authority for Scientific Research, CNCS – UEFISCDI,
project   PN-II-RU-TE-2014,   no. 151 / 2015

Director of proiect:
Conf. univ. dr. Cristian ENACHESCU
(Faculty of Physics, Alexandru Ioan Cuza University, Iaşi)

           The project is devoted to the study of fundamental properties of nano and micro structured spin-crossover (SC) materials embedded in various media. These compounds, having two spin states with different magnetic and optical properties, are intensely studied due to their potential use in technological applications, as data storage or sensors and actuators. As the molecules also have different volumes in the two states, the SC materials are dominated by elastic interactions which trigger multi-hysteretic behavior induced by temperature, pressure or light. In addition, some micro and nanoparticles of SC materials embedded in polymers or surfactants show a huge hysteresis of mechanical nature. Their behaviour is not only influenced by the environment, but equally, in core-shell structures, the transition of shell SC materials could influence the piezoelectric properties of core materials. Therefore, the SC nanoparticles embedded in various media are interesting for potential applications due to their intrinsic properties but also due to the mechanical influence on environment. The present research will have two main directions: one experimental and the other of modeling. The experimental study of the mentioned compounds will include magnetometric and optical measurements. The experiments will be closely accompanied by a modeling effort using Monte Carlo approaches which will cover the domain from the molecular level up to and nano and microstructures.

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