公开(公告)号：US08508005B2

公开(公告)日：2013-08-13

申请号：US13477200

申请日：2012-05-22

申请人： Kaizhong Gao ,  Haiwen Xi ,  Wenzhong Zhu ,  Olle Heinonen

发明人： Kaizhong Gao ,  Haiwen Xi ,  Wenzhong Zhu ,  Olle Heinonen

IPC分类号： H01L21/66 ,  G01R33/02 ,  G01C11/14

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/1284 ,  G11C11/161 ,  G11C11/1675

摘要： A spin-transfer torque memory unit includes a free magnetic layer having a magnetic easy axis; a reference magnetic element having a magnetization orientation that is pinned in a reference direction; an electrically insulating and non-magnetic tunneling barrier layer separating the free magnetic layer from the magnetic reference element; and a compensation element adjacent to the free magnetic layer. The compensation element applies a bias field on the magnetization orientation of the free magnetic layer. The bias field is formed of a first vector component parallel to the easy axis of the free magnetic layer and a second vector component orthogonal to the easy axis of the free magnetic layer. The bias field reduces a write current magnitude required to switch the direction of the magnetization orientation of the free magnetic layer.

摘要翻译： 自旋转移力矩存储单元包括具有易磁化轴的自由磁性层; 具有被固定在参考方向上的磁化取向的参考磁性元件; 将自由磁性层与磁性参考元件分离的电绝缘和非磁性隧道势垒层; 以及与自由磁性层相邻的补偿元件。 补偿元件对自由磁性层的磁化取向施加偏置场。 偏置场由平行于自由磁性层的容易轴的第一矢量分量和与自由磁性层的容易轴正交的第二矢量分量形成。 偏置场减小了切换自由磁性层的磁化取向方向所需的写入电流幅度。

公开(公告)号：US20120248558A1

公开(公告)日：2012-10-04

申请号：US13477200

申请日：2012-05-22

申请人： Kaizhong Gao ,  Haiwen Xi ,  Wenzhong Zhu ,  Olle Heinonen

发明人： Kaizhong Gao ,  Haiwen Xi ,  Wenzhong Zhu ,  Olle Heinonen

IPC分类号： H01L29/82

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/1284 ,  G11C11/161 ,  G11C11/1675

摘要： A spin-transfer torque memory unit includes a free magnetic layer having a magnetic easy axis; a reference magnetic element having a magnetization orientation that is pinned in a reference direction; an electrically insulating and non-magnetic tunneling barrier layer separating the free magnetic layer from the magnetic reference element; and a compensation element adjacent to the free magnetic layer. The compensation element applies a bias field on the magnetization orientation of the free magnetic layer. The bias field is formed of a first vector component parallel to the easy axis of the free magnetic layer and a second vector component orthogonal to the easy axis of the free magnetic layer. The bias field reduces a write current magnitude required to switch the direction of the magnetization orientation of the free magnetic layer.

摘要翻译： 自旋转移力矩存储单元包括具有易磁化轴的自由磁性层; 具有被固定在参考方向上的磁化取向的参考磁性元件; 将自由磁性层与磁性参考元件分离的电绝缘和非磁性隧道势垒层; 以及与自由磁性层相邻的补偿元件。 补偿元件对自由磁性层的磁化取向施加偏置场。 偏置场由平行于自由磁性层的容易轴的第一矢量分量和与自由磁性层的容易轴正交的第二矢量分量形成。 偏置场减小了切换自由磁性层的磁化取向方向所需的写入电流幅度。

公开(公告)号：US20110194343A1

公开(公告)日：2011-08-11

申请号：US13086613

申请日：2011-04-14

申请人： Kaizhong Gao ,  Haiwen Xi ,  Wenzhong Zhu ,  Olle Heinonen

发明人： Kaizhong Gao ,  Haiwen Xi ,  Wenzhong Zhu ,  Olle Heinonen

IPC分类号： G11C11/14 ,  G11B5/66

CPC分类号： G01R33/093 ,  B82Y25/00 ,  G01R33/1284 ,  G11C11/161 ,  G11C11/1675

摘要： Spin-transfer torque memory having a compensation element is disclosed. A spin-transfer torque memory unit includes a free magnetic layer having a magnetic easy axis and a magnetization orientation that can change direction due to spin-torque transfer when a write current passes through the spin-transfer torque memory unit; a reference magnetic element having a magnetization orientation that is pinned in a reference direction; an electrically insulating and non-magnetic tunneling barrier layer separating the free magnetic layer from the magnetic reference element; and a compensation element adjacent to the free magnetic layer. The compensation element applies a bias field on the magnetization orientation of the free magnetic layer. The bias field is formed of a first vector component parallel to the easy axis of the free magnetic layer and a second vector component orthogonal to the easy axis of the free magnetic layer. The bias field reduces a write current magnitude required to switch the direction of the magnetization orientation of the free magnetic layer.

摘要翻译： 公开了具有补偿元件的自旋转矩存储器。 自旋转移力矩存储单元包括具有磁性容易轴的自由磁性层和当写入电流通过自旋转移转矩存储单元时由于自旋转矩传递而改变方向的磁化取向; 具有被固定在参考方向上的磁化取向的参考磁性元件; 将自由磁性层与磁性参考元件分离的电绝缘和非磁性隧道势垒层; 以及与自由磁性层相邻的补偿元件。 补偿元件对自由磁性层的磁化取向施加偏置场。 偏置场由平行于自由磁性层的容易轴的第一矢量分量和与自由磁性层的容易轴正交的第二矢量分量形成。 偏置场减小了切换自由磁性层的磁化取向方向所需的写入电流幅度。