Room-temperature observation and current control of skyrmions in Pt/Co/Os/Pt thin films

被引：48
作者：
Tolley, R. [1 ,2 ]
Montoya, S. A. [3 ]
Fullerton, E. E. [1 ,2 ]
机构：
[1] Univ Calif San Diego, Ctr Memory & Recording Res, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Dept Elect & Comp Engn, La Jolla, CA 92093 USA
[3] Space & Naval Warfare Syst Ctr Pacific, San Diego, CA 92152 USA
来源：
PHYSICAL REVIEW MATERIALS | 2018年 / 2卷 / 04期
关键词：
MAGNETIC DOMAIN-STRUCTURES; REAL-SPACE OBSERVATION; LATTICE; MOTION; STABILITY; DYNAMICS; TORQUE;
D O I：
10.1103/PhysRevMaterials.2.044404
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We report the observation of room-temperature magnetic skyrmions in Pt/Co/Os/Pt thin-film heterostructures and their response to electric currents. The magnetic properties are extremely sensitive to inserting thin Os layers between the Co-Pt interface, resulting in reduced saturation magnetization, magnetic anisotropy, and Curie temperature. The observed skyrmions exist in a narrow temperature, applied-field and layer-thickness range near the spin-reorientation transition from perpendicular to in-plane magnetic anisotropy. The skyrmions have an average diameter of 2.3 mu m and transport measurements demonstrate these features can be displaced by means of spin-orbit torques with current densities as low as J = 2 x 10(8) A/m(2) and display a skyrmion Hall effect.
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页数：8
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