Magnetic and Electronic Properties of Disordered (Gd_{1 - x}Y_x)₇Pd₃Alloys - Theoretical Study

Abstract

The ab initio study of electronic and magnetic properties of (Gd1−xYx)7Pd3 alloys are presented. The electronic structure calculations were performed using FP-LAPW method. Basing on the ground-state single-electron results the many particle sf model for disordered alloy with strongly correlated band electrons was parameterized. The concentration dependence of the band structure, magnetic moment, and the Curie temperature is presented and discussed in reference to experimental data.

Magnetic and transport properties of Gd7−xYxPd3 (x=0–6) system

“…12). Recently, the calculations confirmed the experimental observation of increasing saturation magnetization (per Gd atom) with decreasing concentration of gadolinium [20]. However, according to the ab initio results, this effect is due to the induced local magnetic of yttrium atoms, while Pd atoms are magnetically less active.…”

Czochralski Method for Crystal Growth οf Reactive Intermetallics

“…Substitution of the non-magnetic yttrium into gadolinium sublattice leads to new mechanisms of interac- tions: the modication of the exchange Ruderman KittelKasuyaYosida (RKKY) interactions between Gd ions (decrease of ordering temperature), the hybridization process via Y 4d (enhanced magnetic coupling [18]), magnetic disorder (transport and magnetic properties), decrease of the magnetic frustration (transport and magnetic properties). Substitution of nickel into palladium sublattice in Gd 7 Ni x Pd 3−x series changes the hybridization mechanism (now via Ni 3d states) which inuences in dierent way on the magnetic interactions and magnetocaloric properties which will be the object of further examinations.…”