Free-Spin Dominated Magnetocaloric Effect in Dense Gd³⁺ Double Perovskites.

ABSTRACT: Frustrated lanthanide oxides with dense magnetic lattices are of fundamental interest for their potential in cryogenic refrigeration due to a large ground state entropy and suppressed ordering temperatures but can often be limited by short-range correlations. Here, we present examples of frustrated fcc oxides, Ba₂GdSbO₆ and Sr₂GdSbO₆, and the new site-disordered analogue Ca₂GdSbO₆ ([CaGd] _A [CaSb] _B O₆), in which the magnetocaloric effect is influenced by minimal superexchange (J ₁ ∼ 10 mK). We report on the crystal structures using powder X-ray diffraction and the bulk magnetic properties through low-field susceptibility and isothermal magnetization mea

SUBMITTER: Koskelo EC 

PROVIDER: S-EPMC9098179 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature