Research Seminar of Prof. Wei Dahai from Institute of Semiconductors, CAS

Lecture Time: 14:00 on 21st December, 2017

Lecture Room: C501 of Science and Innovation Building

Wei Dahai

Institute of Semiconductors, CAS

Abstract

Spin Hall effect (SHE) and its inverse enable the interconversion between charge and spin currents with strong spin-orbit interaction, and have been widely used for the the generation and detection of spin currents. In this talk, I will present two of experimental works on the spin currents and spin Hall effect. One is the SHE in a weak ferromagnetic metal in the vicinity of the magnetic phase transition where the spin-/charge- currents conversion reflects a nonlinear magnetic susceptibility. It shows that the spin current could be used as a sensor for detecting small magnetic fluctuations. The other is the large SHE of a.c. spin current generated by the spin pumping in a hetrostructure. Such a.c. spin current is at least one order of magnitude larger than the d.c.ones, could significant improve the efficiency of spin pumping and related spintronic devices.