Argonne National Laboratory

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Three Issues Related to YIG Spintronics

Mingzhong Wu, Colorado State University
March 27, 2014 2:00PM to 3:00PM
Building 241
This seminar will take place in the Energy Sciences Building, ESB 241, Room D173.

If a magnetic field is applied to a magnetic material, the field produces a torque on the magnetization of the material and drives it to precess. This precession is similar to the motion of a spinning top where the gravitational field produces a torque, instead of the magnetic field. It turns out that magnetization precession in yttrium iron garnet (YIG) decays slower than in any other known magnetic material. This fact gives rise to the recent birth of a new paradigm in the discipline of spintronics – spintronics using yttrium iron garnets.

This talk will touch on several issues related to YIG spintronics. The presentation consists of three main parts. The first part will present on the feasibility of the use of sputtering, a technique widely accepted by industry, to grow low-damping, nanometer-thick YIG films. The second part will touch on the efficiency of spin angular momentum transfer across YIG/normal metal interfaces. The last part will report on the exploration of optimal regimes for spin-wave spin pumping using YIG thin films.