Magnetic frustration and glassiness in an icosahedral i−Tb−Cd quasicrystal

The dynamical magnetic properties of the icosahedral i−Tb−Cd quasicrystal (QC) were investigated by means of squid magnetometry. At low temperatures, below T∼4.5 K, we observe conventional spin glass features including aging, memory, and rejuvenation. Interestingly, from T∼4.5 to 10 K, the spin configuration is also found to evolve with time (i.e., age as in spin glass), yet without memory. This suggests a reentrantlike behavior for the i−Tb−Cd QC, where upon cooling from high temperatures, the system first displays a magnetically frustrated phase before turning into a spin glasslike one at the lowest temperatures. We discuss the nature and possible origin of this magnetic behavior, in the light of the results obtained in the i−Gd−Cd QC, and ternary Tb-based quasicrystal approximants. Published by the American Physical Society 2024