ChemInform Abstract: Stabilization by Si Substitution of the Pseudobinary Compound Gd₂(Co_3‐xSi_x) with Magnetocaloric Properties Around Room Temperature.

Abstract

Stabilization by Si Substitution of the Pseudobinary Compound Gd 2(Co 3-xSix) withMagnetocaloric Properties Around Room Temperature. -The new solid solution Gd 2(Co3-xSix) (0.29 < x < 0.50) is obtained by arc-melting of the elements. Although Gd2Co3 does not exist, the solid solution can be stabilized by substituting a small amount of cobalt by silicon. Gd 2(Co2.53Si0.47) crystallizes in the space group Cmce with Z = 4 (single crystal XRD). All the members of the solid solution exhibit the La 3Ni3-type structure. They show ferrimagnetic order with composition dependent Curie temperatures between 280 and 338 K. The magnetocaloric effect of 1.7 J/(K kg) for a field change of 2 T is tunable around room temperature over a temperature span of 60 K through only 4-5% of composition change. -(TENCE*, S.; CABALLERO FLORES, R.; CHABLE, J.; GORSSE, S.; CHEVALIER, B.; GAUDIN, E.; Inorg. Chem. 53 (2014) 13, 6728-6736, http://dx.doi.org/10.