Ultrafast magnetic switching of GdFeCo with electronic heat currents

作     者：R. B. Wilson Jon Gorchon Yang Yang Charles-Henri Lambert Sayeef Salahuddin Jeffrey Bokor 

作者机构：Department of Mechanical Engineering and Materials Science & Engineering Program University of California Riverside California 92521 USA Department of Electrical Engineering and Computer Sciences University of California Berkeley California 94720 USA Lawrence Berkeley National Laboratory 1 Cyclotron Road Berkeley California 94720 USA Department of Materials Science and Engineering University of California Berkeley California 94720 USA 

出 版 物：《Physical Review B》 (Phys. Rev. B)

年 卷 期：2017年第95卷第18期

页      面：180409(R)-180409(R)页

核心收录：

基　　金：National Science Foundation Center for Energy Efficient Electronics Science U.S. Department of Energy, USDOE, (DE-AC02-05-CH11231) Office of Science, SC Basic Energy Sciences, BES Division of Materials Sciences and Engineering, DMSE 

主　　题：Ferrimagnetism Magnetization switching Magneto-optical Kerr effect Multilayer thin films Femtosecond laser irradiation Kerr effect Photoexcitation 

摘      要：We report the magnetic response of Pt/Au/GdFeCo trilayers to optical irradiation of the Pt surface. For trilayers with Au thickness greater than 50 nm, the great majority of energy is absorbed by the Pt layer, creating an initial temperature differential of thousands of kelvin between the Pt/Au layers and the GdFeCo layer. The resulting electronic heat current across the metal multilayer lasts for several picoseconds with energy flux in excess of 2TWm−2 and provides sufficient heating to the GdFeCo electrons to induce deterministic reversal of the magnetic moment.