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

He, Min; Li, Gang; Zhu, Zhaozhao; Zhang, Ying; Peng, Licong; Li, Rui; Li, Jianqi; Wei, Hongxiang; Zhao, Tongyun; Zhang, X. -G.; Wang, Shouguo; Lin, Shi-Zeng; Gu, Lin; Yu, Guoqiang; Cai, J. W.; Shen, Bao-gen

doi:10.1103/PhysRevB.97.174419

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

Journal Article · Mon May 21 04:00:00 EDT 2018 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.97.174419· OSTI ID:1479959

He, Min ^[1]; Li, Gang ^[1]; Zhu, Zhaozhao ^[1]; Zhang, Ying ^[2]; Peng, Licong ^[1]; Li, Rui ^[1]; Li, Jianqi ^[1]; Wei, Hongxiang ^[2]; Zhao, Tongyun ^[2]; Zhang, X. -G. ^[3]; Wang, Shouguo ^[4]; Lin, Shi-Zeng ^[5]; Gu, Lin ^[1]; Yu, Guoqiang ^[2]; Cai, J. W. ^[1]; Shen, Bao-gen ^[1]

Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics, Inst. of Physics; Univ. of Chinese Academy of Sciences, Beijing (China). School of Physical Sciences
Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics, Inst. of Physics
Univ. of Florida, Gainesville, FL (United States). Dept. of Physics and the Quantum Theory Project
Beijing Normal Univ., Beijing (China). Inst. of Advanced Materials
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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, Néel-type skyrmions at room temperature (RT) have been studied mostly in multilayers with easy-axis magnetic anisotropy. Here in this paper, 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.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1479959

Report Number(s):: LA-UR--18-24332

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 17 Vol. 97; ISSN 2469-9950; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Spontaneous nanometric magnetic bubbles with various topologies in spin-reoriented La _1−x Sr _x MnO ₃ Peng, Licong; Zhang, Ying; Hong, Deshun Applied Physics Letters, Vol. 113, Issue 14 https://doi.org/10.1063/1.5051014	journal	October 2018
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