Mingzhong WU
Department of Physics, Colorado State University, Fort Collins, CO 80523, USA
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时间：2014年7月30日上午10：00
地点：仙林逸夫馆B 205
Abstract
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.
Mingzhong Wu received his Ph.D. in Solid State Electronics from Huazhong University of Science and Technology in 1999, joined the faculty of Colorado State University (CSU) in 2007, and is currently an Associate Professor in Physics at CSU. He is interested in many topics in magnetics. His current research areas include magnetization dynamics, spintronics, nonlinear spin waves, multiferroics, and microwave magnetic materials and devices. He has authored/coauthored 105 publications, including 1 book, 4 book chapters, and 14 papers in PRL. He is currently serving as the Chair of the IEEE Magnetics Society Education Committee and an Associate Editor for IEEE Magnetics Letters.