Magnetic properties of the 1/1 approximant Ag42In42Gd16 to the icosahedral quasicrystal Ag-In-Gd

▶ The 1/1 approximant Ag42In42Gd16 is a spin glass with freezing temperature of 3.6(1) K. ▶ The spin freezing process is a true equilibrium phase transition rather than a nonequilibrium phenomenon. ▶ The Debye temperature of this compound is 200(1) K.