Spin-transition chemical compounds, and devices comprising read-, memory-, and erase-units, active medium which contains at least one of those compounds

摘要

Chemical cpds. capable of undergoing spin transitions, in the form of a powder, including a lattice with a mol. formed from a complex in which Fe (Fe(II)) is associated with a 1.2.4-triazole (H-Trz) ligand of formula: the mol. also comprising an anion (A)2 chosen from BF4-, ClO4-, Br- and CO32-, this mol. having the formula (a) Fe(II) (H-Trz)3(BF4-)2, (b) Fe(II)(H-Trz)3(ClO4-)2, (c) Fe(II) (H-Trz)3(Br-)2, (d) Fe(II) (H-Trz)3(Cl-)2 or (e) Fe(II) (H-Trz)3(ClO32-) depending on the anion.