Pressure effect studies in molecular magnetism

Thermo- and piezochromic properties of [Fe(hyptrz)]A2·H2O spin crossover 1D coordination polymer: Towards spin crossover based temperature and pressure sensors

“…Regarding this issue, very few attempts have been noticed to record the (p-T) phase diagram by using various detection techniques such as optical reflectivity [19][20][21][29][30][31], magnetic techniques [15][16][17][18][32][33][34], X-ray and neutron diffraction [35][36][37][38][39]. This lack of data could be explained by the difficulty to obtain small variations in the applied pressure in both loading and unloading processes, at variable temperatures.…”

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo2As2 single crystal

“…This indicates that the resistivity of BaCo 2 As 2 depends on the crystal homogeneity. It is pointed that such large values of r 0 $ 4.6 mV cm and RRR $ 13 at 8 GPa are found in BaCo 2 As 2 due to strong spinning fluctuations induced by the presence of magnetic impurities/imperfections or change of valence of Co 2+ (3d) under pressure [15,16]. These factors would reduce or change with the electron density of states at the Fermi surface resulting in an enhancement of metallic behavior under external pressure up to 8 GPa.…”

Pressure-induced two-step spin transition with structural symmetry breaking: X-ray diffraction, magnetic, and Raman studies

“…25 Indeed, the majority of high-pressure investigations involving SCO systems have used spectroscopic techniques or magnetic studies to characterize the effect of applied pressure on the spin transition. 26 Very few studies to date have used diffraction techniques to explore the relationship between structure and properties of SCO materials under pressure, [27][28][29][30] but such investigations are essential to establishing the driving forces behind the pressure-induced spin transition, as well as to thorough investigation of more complex phenomena such as stepped transitions.…”