Sub 1 K Adiabatic Demagnetization Refrigeration with Rare-Earth Borates Ba${}_3$XB${}_9$O${}_{18}$ and Ba${}_3$XB${}_3$O${}_9$, X = (Yb, Gd)

Marvin Klinger, Tim Treu, Felix Kreisberger +4

Adiabatic demagnetization refrigeration (ADR) is regaining relevance for the refrigeration to temperatures below 1 K as global helium-3 supply is increasingly strained. While ADR a…