Effect of Lattice Distortion on the Magnetic Tunnel Junctions Consisting of Periodic Grating Barrier and Half-Metallic Electrodes  

作　　者：He-Nan Fang Yuan-Yuan Zhong Ming-Wen Xiao Xuan Zang Zhi-Kuo Tao 方贺男;仲元园;肖明文;臧璇;陶志阔(College of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023;Department of Physics,Nanjing University,Nanjing 210093)

机构地区：[1]College of Electronic and Optical Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210023 [2]Department of Physics,Nanjing University,Nanjing 210093

出　　处：《Chinese Physics Letters》2020年第3期86-89,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos.11704197 and 61574079;the NUPTSF under Grant No.NY217046。

摘　　要：A spintronic theory is developed to study the effect of lattice distortion on the magnetic tunnel junctions(MTJs)consisting of single-crystal barrier and half-metallic electrodes.In the theory,the lattice distortion is described by strain,defect concentration and recovery temperature.All three parameters will modify the periodic scattering potential,and further alter the tunneling magnetoresistance(TMR).The theoretical results show that:(1)the TMR oscillates with all the three parameters;(2)the strain can change the TMR about 30%;(3)the defect concentration will strongly modify the periodic scattering potential,and further change the TMR about 50%;and(4)the recovery temperature has little effect on the periodic scattering potential,and only can change the TMR about 10%.The present work may provide a theoretical foundation to the application of lattice distortion for MTJs consisting of single-crystal barrier and half-metallic electrodes.

关 键 词：temperature. DISTORTION EFFECT 

分 类 号：O469[理学—凝聚态物理]