The effects of electric and magnetic fields on the current spin polarization and magnetoresistance in a ferromagnetic/organic semiconductor/ferromagnetic（FM/OSC/FM） system  

作　　者：王玉梅 任俊峰 原晓波 窦兆涛 胡贵超 

机构地区：[1]College of Physics and Electronics,Shandong Normal University,Jinan 250014,China

出　　处：《Chinese Physics B》2012年第10期539-545,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China （Grant Nos. 10904083 and 10904084）; the Shandong Provincial Distinguished Middle-Aged and Young Scientist Encourage and Reward Foundation,China （Grant No. BS2009CL008）; the Science and Technology Foundation for Institution of Higher Education of Shandong Province,China （Grant No. J09LA03）

摘　　要：From experimental results of spin polarized injection and transport in organic semiconductors（OSCs）,we theoretically study the current spin polarization and magnetoresistance under an electric and a magnetic field in a ferromagnetic/organic semiconductor/ferromagnetic（FM/OSC/FM） sandwich structure according to the spin drift-diffusion theory and Ohm＇s law.From the calculations,it is found that the interfacial current spin polarization is enhanced by several orders of magnitude through tuning the magnetic and electric fields by taking into account the specific characteristics of OSC.Furthermore,the effects of the electric and magnetic fields on the magnetoresistance are also discussed in the sandwich structure.From experimental results of spin polarized injection and transport in organic semiconductors（OSCs）,we theoretically study the current spin polarization and magnetoresistance under an electric and a magnetic field in a ferromagnetic/organic semiconductor/ferromagnetic（FM/OSC/FM） sandwich structure according to the spin drift-diffusion theory and Ohm＇s law.From the calculations,it is found that the interfacial current spin polarization is enhanced by several orders of magnitude through tuning the magnetic and electric fields by taking into account the specific characteristics of OSC.Furthermore,the effects of the electric and magnetic fields on the magnetoresistance are also discussed in the sandwich structure.

关 键 词：organic spintronics spin diffusion and drift current spin polarization MAGNETORESISTANCE 

分 类 号：TN304.5[电子电信—物理电子学]