Thermoelectric Properties of Nickel and Selenium Co-Doped Tetrahedrite.

As the search continues for novel, cheaper, more sustainable, and environmentally friendly thermoelectric materials in order to expand the range of applications of thermoelectric devices, the tetrahedrite mineral (CuSbS) stands out as a potential candidate due to its high abundance, low toxicity, and good thermoelectric performance. Unfortunately, as most current thermoelectric materials achieve zTs above 1.0, ternary tetrahedrite is not a suitable alternative.

Enhancing SIM behaviour in a mononuclear tetrahedral [Co(,'-2-iminopyrrolyl)] complex.

A new homoleptic Co(II) complex bearing two highly sterically congested 2-formiminopyrrolyl ,'-chelating ligands is reported, displaying slow relaxation of the magnetisation at zero static (DC) field. This compound shows a large value for the zero-field splitting (ZFS) parameter of -42.6(4) cm leading to a spin-reversal energy barrier of 85 cm.