S. Von Molnar, R.J. Gambino, et al.
Journal of Applied Physics
Sputtered amoprhous films of Gd0.41Cu0.59 and those with higher concentration of Gd are found to be ferromagnetic with Curie temperatures 75 K and higher. In contrast Gd0.37Al0.63 is found to take a spin glass state with a transition temperature of 15.8 K as defined by a sharp asymmetric cusp in the static susceptibility when measured in low magnetic fields. Below 15.8 K relaxation and thermal hysteresis effects of the susceptibility are found, characteristics of a spin glass. © 1977.