Work

Engineering spin-orbit torque in Co/Pt multilayers with perpendicular magnetic anisotropy

Year: 2015

Type: article

Abstract: To address thermal stability issues for spintronic devices with a reduced size, we investigate spin-orbit torque in Co/Pt multilayers with strong perpendicular magnetic anisotropy. Note that the spin-orbit torque arises from the global imbalance of the spin currents from the top and bottom interfaces for each Co layer. By inserting Ta or Cu layers to strengthen the top-down asymmetry, the spin-orbit torque efficiency can be greatly modified without compromised perpendicular magnetic anisotropy. Above all, the efficiency builds up as the number of layers increases, realizing robust thermal stability and high spin-orbit-torque efficiency simultaneously in the multilayers structure.

Source: Applied Physics Letters

DOI: 10.1063/1.4937443

Authors: Kuo-Feng Huang, Ding-Shuo Wang, Hsiu-Hau Lin, Chih-Huang Lai

Institution: National Tsing Hua University

Language: English

Topic: Magnetic properties of thin films

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Ministry of Science and Technology, Taiwan

Awards: Magnetization Switching Induced by Spin Hall Effect in 2d Materials, Development of New Manipulatiing Method for Current Induced Magnetic Domain Wall Motion by Novel Artificial Pinning Site