Thermal Expansion Anomaly of Eu_xYb_1−x Alloy

Abstract

The thermal expansion of Eu_xYb_1−x alloy was measured in the temperature range from 4.2 K to 80 K. Invar type anomaly was observed for x=0.1 and 0.2. The minimum values of the thermal expansion coefficient for x=0.1 and 0.2 were −7×10⁻⁵ K⁻¹ and −6×10⁻⁵ K⁻¹, respectively.