Evolution of topological skyrmions across the spin reorientation transition in Pt/Co/Ta multilayers

被引：47

作者：

He, Min ^{[1
,2
]}

Li, Gang ^{[1
,2
]}

Zhu, Zhaozhao ^{[1
,2
]}

Zhang, Ying ^{[1
]}

Peng, Licong ^{[1
,2
]}

Li, Rui ^{[1
,2
]}

Li, Jianqi ^{[1
,2
]}

Wei, Hongxiang ^{[1
]}

Zhao, Tongyun ^{[1
]}

Zhang, X-G ^{[3
,4
]}

Wang, Shouguo ^{[5
]}

Lin, Shi-Zeng ^{[6
]}

Gu, Lin ^{[1
,2
]}

Yu, Guoqiang ^{[1
]}

Cai, J. W. ^{[1
,2
]}

Shen, Bao-gen ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Phys Sci, Beijing 100049, Peoples R China

[3] Univ Florida, Dept Phys, Gainesville, FL 32611 USA

[4] Univ Florida, Quantum Theory Project, Gainesville, FL 32611 USA

[5] Beijing Normal Univ, Inst Adv Mat, Beijing 100875, Peoples R China

[6] Los Alamos Natl Lab, Theoret Div, Los Alamos, NM 87545 USA

来源：

PHYSICAL REVIEW B | 2018年 / 97卷 / 17期

基金：

中国国家自然科学基金;

关键词：

TEMPERATURE MAGNETIC SKYRMIONS; DYNAMICS; LATTICE;

D O I：

10.1103/PhysRevB.97.174419

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Magnetic skyrmions in multilayers are particularly appealing as next generation memory devices due to their topological compact size, the robustness against external perturbations, the capability of electrical driving and detection, and the compatibility with the existing spintronic technologies. To date, Neel-type skyrmions at room temperature (RT) have been studied mostly in multilayers with easy-axis magnetic anisotropy. Here, we systematically broadened the evolution of magnetic skyrmions with sub-50-nm size in a series of Pt/Co/Ta multilayers where the magnetic anisotropy is tuned continuously from easy axis to easy plane by increasing the ferromagnetic Co layer thickness. The existence of nontrivial skyrmions is identified via the combination of in situ Lorentz transmission electron microscopy (L-TEM) and Hall transport measurements. A high density of magnetic skyrmions over a wide temperature range is observed in the multilayers with easy-plane anisotropy, which will stimulate further exploration for new materials and accelerate the development of skyrmion-based spintronic devices.

引用

页数：7

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