Title:
MAGNETIZATION REVERSAL DEVICE BASED ON ORBITAL TRANSFER TORQUE AND IMPLEMENTATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/082456
Kind Code:
A1
Abstract:
A magnetization reversal device based on orbital transfer torque and an implementation method therefor. A direct-current write current is introduced by means of source and drain electrodes, and polarization of an out-of-plane orbital magnetic moment is generated, thereby generating an out-of-plane anti-damping moment effect; under the out-of-plane anti-damping moment effect, magnetization reversal of a perpendicular magnetic anisotropy free ferromagnetic layer can be achieved without additional magnetic field assistance, which is referred to as orbital transfer torque; after withdrawing the write current, the perpendicular magnetic anisotropy free ferromagnetic layer maintains the changed magnetization state, thus being non-volatile; a direct-current write current is introduced by means of source and drain electrodes, and the Hall resistance of a heterojunction is obtained by means of measuring the electrodes, thereby reflecting the magnetization state of the perpendicular magnetic anisotropy free ferromagnetic layer; by changing the direction of the write current, reverse orbital transfer torque is achieved, thereby enabling magnetization inverse reversal of the perpendicular magnetic anisotropy free ferromagnetic layer. Less critical current is required for orbital transfer torque to achieve magnetization reversal, thus the power consumption of the device can be significantly reduced.
Inventors:
LIAO ZHIMIN (CN)
YE XINGGUO (CN)
ZHU PENGFEI (CN)
XU WENZHENG (CN)
YE XINGGUO (CN)
ZHU PENGFEI (CN)
XU WENZHENG (CN)
Application Number:
PCT/CN2022/070023
Publication Date:
May 19, 2023
Filing Date:
January 04, 2022
Export Citation:
Assignee:
UNIV BEIJING (CN)
International Classes:
G11B5/127
Foreign References:
| CN113782668A | 2021-12-10 | |||
| CN112968125A | 2021-06-15 | |||
| US20160276006A1 | 2016-09-22 | |||
| CN110165045A | 2019-08-23 | |||
| CN113488584A | 2021-10-08 | |||
| US6753562B1 | 2004-06-22 |
Attorney, Agent or Firm:
BEIJING WANXIANGXINYUE INTELLECTUAL PROPERTY OFFICE (CN)
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