Details

Autor(en) / Beteiligte

• Kim, Hyun‐Joong
• Moon, Kyoung‐Woong
• Tran, Bao Xuan
• Yoon, Seongsoo
• Kim, Changsoo
• Yang, Seungmo
• Ha, Jae‐Hyun
• An, Kyongmo
• Ju, Tae‐Seong
• Hong, Jung‐Il
• Hwang, Chanyong

Titel

Field‐Free Switching of Magnetization by Tilting the Perpendicular Magnetic Anisotropy of Gd/Co Multilayers

Ist Teil von

• Advanced functional materials, 2022-06, Vol.32 (26), p.n/a

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc

Erscheinungsjahr

2022

Link zum Volltext

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• Efficient current‐induced switching of perpendicular magnetization is an essential task in spintronics for realizing high‐performance information processing and for storage device application. However, the spin‐orbit torque (SOT) by injection of in‐plane polarized spins cannot deterministically switch the magnetization of ferromagnetic thin films with perpendicular magnetic anisotropy (PMA) without an additionally applied in‐plane external magnetic field to break the symmetry of the PMA. Considering the difficulties of applying the magnetic field to the localized area only within a device structure, it is essential to contrive a facile field‐free SOT switching mechanism. Here, deterministic field‐free SOT switching of perpendicular magnetization is achieved in amorphous and ferrimagnetic Gd/Co multilayers accompanied by a tilted magnetic anisotropy axis. This tilted anisotropy originates from the combined contributions of many internal anisotropies in different orientations from the multilayers and is shown to be controllable. It is expected that the introduction of controlled tilted anisotropy into Gd/Co multilayers over the entire film surface in the present study can be extended to the development of wafer‐scale technologies for the spintronics memory and logic devices. The slightly tilted magnetic anisotropy axis of the perpendicular magnetic anisotropy film enables the field‐free magnetization switching of magnetization by spin currents. Stable switching operations can be repeatedly executed using pulsed spin currents.