Spin-injection experiment.

The spin-injection experiment is a two-probe, spin-injector and detector experiment that has demonstrated the validity of a charge-spin coupling at a ferromagnet-paramagnet interface. The spin coupled signal is unambiguously identified by utilizing the Hanle effect; this approach results in a new, nonresonance technique for measuring conduction-electron spin-relaxation times in vanishingly small applied magnetic fields. Details of the spin-injection experiment are presented. The apparatus and techniques of sample preparation are described. Qualitative and quantitative analyses of the data are given, along with numerous examples. The results are discussed within the framework of the models developed in the preceding paper, and a few applications of the new technique are mentioned.