Pressure induced spin crossover photomagnet: crystal structure determination below the magnetic ordering temperature of 10 K under high pres

The aim of the proposal is the determination of the crystal structure of a multifunctional molecular material {[FeII(pyrazole)4]2[NbIV(CN)8].4H2O}n (FeNb) at low temperature and high pressure (up to 1 GPa) in order to understand the pressure-induced spin crossover (SCO) phenomenon and its relation to the magnetic and photomagnetic properties of this compound. The low temperature magnetic data for FeNb suggest that the observed pressure-induced SCO occurs in an ordered manner leading to the change of the ferrimagnetic ordering to the antiferromagnetic one and then to a paramagnetic state around 1.0 GPa. Each of these pressure-induced magnetic phases is expected to show a different photomagnetic response. The proposal will demonstrate for the first time the simultaneous control of the photoswitching properties of a molecular magnet using pressure and temperature. It will also form a basis for understanding the complex magnetic behavior of the studied compound at extreme conditions.