【自旋阀三明治结构制备与GMR效应研究】颜冲.pdf
ADissertationSubmittedinPartialFulfillmentoftheRequirements fortheDegreeofDoctorofPhilosophyinEngineering StudyontheFabrication ofSpin-ValveSandwich Structure and GiantMagnetoresistanceEffect Ph.D.Candidate:Yan Chong Major:Microelectronics and SolidStateElectronics Supervisor:Prof.
华中科技大学博士学位论文 合场H。明显不同,沉积磁场的诱导效应有利于增大双层膜的交换各向异 性。反铁磁材料NiO和铁磁材料CoFe的厚度发生变化时,矫顽力H和 交换耦合场H都会发生变化。实验发现:当Ni0厚度小于25nm时,Ni0 对CoFe没有偏置作用,此厚度即为NiO对CoFe产生交换作用的临界厚 度。随着Ni0厚度的增加,交换耦合场H。和矫顽力H.都增大,当Ni0 的厚度增大到50nm左右时,交换耦合场H达到最大,继续增大Ni0的 厚度,交换耦合场H。几乎看不出变化。保持Ni0的厚度不变而增加铁磁 材料CoFe的厚度时交换耦合场H和矫顽力H.都近似线性地减小。
华中科技大学博士学位论文 coupling through the copper layers with a period of about 1 nm.The oscillatory peaks became low when the spacer thicknessincreased.The effectsofvariationthicknessofferromagneticlayersonGMRwere researched.It was found that there were maximal GMR values when the ferromagneticlayerCoFeth