公开(公告)号：US20110063758A1

公开(公告)日：2011-03-17

申请号：US12925632

申请日：2010-10-26

Applicant: Shan X. Wang ,  George Michael Chapline

Inventor： Shan X. Wang ,  George Michael Chapline

IPC: G11B5/33

CPC classification number: H01L29/66984 ,  B82Y25/00 ,  H01L43/08

Abstract: A magnetic tunnel junction having a first electrode separated from a second electrode by a tunneling barrier is provided. The tunneling barrier is a ferromagnetic insulator that provides a spin dependent barrier energy for tunneling. The first electrode includes a ferromagnetic, electrically conductive layer. Electrons emitted from the first electrode toward the tunneling barrier are partially or completely spin-polarized according to the magnetization of the ferromagnetic electrode layer. The electrical resistance of the tunnel junction depends on the relative orientation of the electrode layer magnetization and the tunneling barrier magnetization. Such tunnel junctions are widely applicable to spintronic devices, such as spin valves, magnetic tunnel junctions, spin switches, spin valve transistors, spin filters, and to spintronic applications such as magnetic recording, magnetic random access memory, ultrasensitive magnetic field sensing (including magnetic biosensing), spin injection and spin detection.

Abstract translation: 提供了具有通过隧道势垒从第二电极分离的第一电极的磁性隧道结。 隧道势垒是铁磁绝缘体，其提供用于隧穿的自旋相关势垒能。 第一电极包括铁磁性导电层。 从第一电极向隧道势垒发射的电子根据铁磁性电极层的磁化而部分或完全自旋极化。 隧道结的电阻取决于电极层磁化和隧道势垒磁化的相对取向。 这种隧道结广泛适用于自旋阀，自旋阀，磁隧道结，自旋开关，自旋阀晶体管，自旋过滤器等自旋电子器件，以及磁记录，磁性随机存取存储器，超磁场感应（包括磁性） 生物传感），自旋注射和自旋检测。