Anomalous Spin-Flip Lifetime Near the Heisenberg-Ferromagnet Critical Point.

摘要

The inverse lifetime, 1/tau sub s, of spin-flip processes for the conduction electrons in a Heisenberg ferromagnet is calculated in the first Born approximation. It is found that the temperature derivative of 1/tau sub s varies as (T-T sub c) to the (2nu-gamma-1) and is negative above T sub c and positive below T sub c. Comparison is made with the behavior of the electrical resistivity near T sub c. The impact upon the superconducting transition temperature is examined. (Author)