Electrical Resistivity of Lanthanum, Praseodymium, Neodymium, and Samarium

The electrical resistivities of polycrystalline samples of La, Pr, Nd, and Sm are reported in the temperature range 1.3^∘{}K to 300^∘{}K. La exhibits a superconducting transition at 5.8^∘{}K. The curve for Pr has slope changes at 61^∘{}K and 95^∘{}K. The Nd curve shows small jumps at 5^∘{}K and 20^∘{}K. Sm shows slope changes at 14^∘{}K and 106^∘{}K.