论文部分内容阅读
Perovskite-type oxide heterostructures,especially the interfaces,are arousing more and more interest due to its unique physical and chemical properties.1,2 By first-principles calculations on tetragonal La2/3Sr1/3MnO3(LSMO)/BiFeO3(BFO)bilayers,we demonstrate two interfacial couplings,direct and indirect,for achieving the net Fe moment in the first layer of interfacial regions.The direct Fe--Mn exchange coupling induces such a net Fe moment of 0.55 ?B in MnO2/Fe-O2 model,forming a net ferromagnetic arrangement with adjoining Mn ions.While,the indirect Fe+-OB-Mn pathway induces a net Fe moment with-1.07 μB in MnO2/O2-Fe model,which forms an antiferromagnetic arrangement with Mn.Especially,the interfacial net Fe moment in MnO2/Fe-O2 model with 100% spin polarization can be reversed into the opposite direction by an electric field.In spin-valve device,such controllable interfaces will develop a specific magnetic field region(-HC4
其他文献
摘要：“自主互助”的理念在教学改革中日益凸显，其宗旨就是为每个学生创设适合的教育，把学生从过重的课业负担、学业负担和心理负担中解放出来；让学生在自主学习实践和发展成长的过程中，展现个性的魅力，形成积极向上的心态，体验成功的喜悦，在乐中学，在学中乐。笔者深刻领悟“自主互助”的宗旨并运用到培养学生的英语写作能力方面，克服了学生对于写英语作文认为是一种负担的不良情绪，化畏写为乐写，取得了可喜的成绩。
Coupled impacts of global change and human activity on biogeography of rocky intertidal species alon
Intertidal rocky shore is one of the most vulnerable ecosystems facing global change.Based on long-term environmental monitoring and modelling predication,m
会议
The structural evolution of hydrogenated silicon carbide nanocrystals:An approach from bond energy m
For the contribution of novel properties of nanomaterials to their variety of structures,it is a vital tasks to obtian the stable configurations under deffe
会议
Compounds composed of 13 group deficient elements are easy to form multicenter bonds,i.e.,boranes,carbon-boron mixed cluster hydrides and many aluminum rich
会议
The oxidation behaviors of CO molecules on single Pd atom embedded graphene has been investigated by using the first principles calculations.Three reaction
会议
近二十年来，轨道在1000km以下的低轨卫星由于其特殊的应用和科研需要得到了迅速的发展，在很多领域发挥了重大的作用。随着GPS技术的开发和利用，利用星载GPS接收机为低轨卫星提供
金属有机骨架(Metal Organic Frameworks,MOFs)是近年来迅速发展的一类具有纳米孔洞的新型晶体材料,由有机配体与金属离子(簇)通过配位键构筑而成,具有可调变的孔容孔径
会议
Hydrostatic pressure has been utilized for the modulation of structures,in particular the bond length between rare earth and oxygen.We pay much attention to
会议