Phase compositions and crystal structures of Gd6X 2Si3 (X = Ni, Co,) and Ln6Co2Si 3 (Ln = Pr, La) have been studied. The magnetic properties of Gd 6X2Si3 (X = Ni, Co) and Ln6Co 2Si3 (Ln = Pr, La) have been evaluated from magnetization measurements performed by a superconducting quantum interference device magnetometer in a temperature interval of 5-400 K, and at magnetic fields up to 5T. The crystal structures of Gd6X2Si3 (X = Co, Ni) and Ln6Co2Si3 (Ln = Pr, La) were found to be hexagonal at 300 K. The Curie temperature (TC), effective and magnetic moment of the compounds (at5 K) have been determined for Gd 6X2Si3 (X = Ni, Co), and Ln6Co 2Si3 (Ln = Pr, La). TC was found to depend on composition, and reaches maximum value of about 300 K for the Gd 6X2Si3 system. Themagnetocaloric effect (magnetic entropy changes and relative cooling power (RCP) was found to depend on X and Ln, and the maximum RCP values were found to be larger than 500 J/kg near room temperature for the Gd6Ni2Si3 and Gd6Co2Si3 compounds. This value of RCP is comparable to the prototype magnetic refrigeration material, Gd. © 2011 American Institute of Physics.
Publication Source (Journal or Book title)
Journal of Applied Physics
Pathak, A., Dubenko, I., Stadler, S., & Ali, N. (2011). Magnetic and magnetocaloric properties of Gd6X 2Si3 (X = Ni, Co) and Ln6Co2Si 3 (Ln = Pr, La). Journal of Applied Physics, 109 (7) https://doi.org/10.1063/1.3544509