空中骑兵
纳米尺度
凝聚态物理
霍尔效应
磁场
材料科学
氧化物
磁力显微镜
异质结
纳米技术
物理
磁化
量子力学
冶金
作者
Keng Yuan Meng,Adam Ahmed,Mirko Baćani,Andrada-Oana Mandru,Xue Zhao,Núria Bagués,Bryan D. Esser,Jose Flores,David W. McComb,Hans J. Hug,Fengyuan Yang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2019-04-01
卷期号:19 (5): 3169-3175
被引量:106
标识
DOI:10.1021/acs.nanolett.9b00596
摘要
Skyrmion imaging and electrical detection via topological Hall (TH) effect are two primary techniques for probing magnetic skyrmions, which hold promise for next-generation magnetic storage. However, these two kinds of complementary techniques have rarely been employed to investigate the same samples. We report the observation of nanoscale skyrmions in SrIrO3/SrRuO3 (SIO/SRO) bilayers in a wide temperature range from 10 to 100 K. The SIO/SRO bilayers exhibit a remarkable TH effect, which is up to 200% larger than the anomalous Hall (AH) effect at 5 K, and zero-field TH effect at 90 K. Using variable-temperature, high-field magnetic force microscopy (MFM), we imaged skyrmions as small as 10 nm, which emerge in the same field ranges as the TH effect. These results reveal a rich space for skyrmion exploration and tunability in oxide heterostructures.
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