Sensors of Super Five Sense and Brain Mimetic Devices Formed by Organic/Inorganic Hetero Structure

采用激光分子束外延（MBE）技术和RHEED监测系统相结合的方法制备了过渡金属氧化物超晶格。在SrTiO_3（100）、（110）和（111）表面上构筑了磁性超晶格。这些表面选择使我们能够控制原子和自旋的三维定位。在LaCrO_3/LaFeO_3（111）面超晶格中，首次实现了铁磁性。在LaMnO_3/LaFe_（03）超晶格中，自旋阻挫与自掺杂LaMnO_（33）的铁磁性和LaFe_（03）在SrTiO_3（100）表面上的反铁磁性相互竞争。在LaMnO_3/LaFeO_3超晶格中观察到自旋玻璃相变（casp形状的磁化强度与温度的关系）。这是由于LaMnO_3层中的铁磁耦合与LaFeO_3层中的反铁磁耦合之间的自旋阻挫作用造成的。

Superlattices of transition metal oxides have been formed by a laser Molecular Beam Epitaxy (MBE) technique connected with RHEED monitoring system. The superlattices of magnetics have been constructed on SrTiO_3(100), (110) and (111) surfaces. These surface selection enables us tocontrol the threedimensional positioning of atoms and spin. In the case of LaCrO_3/LaFeO_3 superlattices on (111) surface, ferromagnetism has been realized for the first time. In the case of LaMnO3/LaFe03 superlattices, on the other hand, spin frustration is expected competing with ferromagnetism of self-doped LaMnO_33 and anti-ferromagnetism of LaFeO_3 on SrTiO3 (100) surface. Spin glass phase transition (casp shape in magnetization vs. temperature measurements) is observed in the case of LaMnO_3/LaFeO_3 superlattices. It is due to the spin frustration between ferromagnetic couping in LaMnO3 layer and antiferromagnetic coupling in LaFeO_3 layer.