Deterministic Current Induced Magnetic Switching Without External Field using Giant Spin Hall Effect of β-W

Area of Science:

• Spintronics
• Condensed Matter Physics
• Materials Science

Background:

• Giant spin Hall effect (GSHE) is crucial for spintronic devices.
• GSHE-based thin films offer efficient magnetization manipulation.
• Current methods require external magnetic fields for switching.

Purpose of the Study:

• To achieve field-free deterministic perpendicular magnetic switching.
• To explore novel FM/NM/FM structures for spintronics.
• To leverage the properties of transition metal beta-tungsten.

Main Methods:

• Fabrication of a novel FM/NM/FM thin-film structure.
• Utilizing the large spin Hall angle of transition metal beta-tungsten.
• Investigating magnetic switching behavior without external magnetic fields.

Main Results:

• Demonstrated field-free deterministic perpendicular magnetic switching.
• Achieved critical switching current density on the order of 10^6 A/cm^2.
• Showcased the effectiveness of the FM/NM/FM structure with beta-W.

Conclusions:

• The proposed FM/NM/FM structure enables efficient, field-free magnetic switching.
• This advancement is significant for future spintronic applications.
• Beta-tungsten's large spin Hall angle is key to this achievement.