Open AccessObservation of Nanoscale Skyrmions in SrIrO3/SrRuO3 Bilayers
Author(s) -
KengYuan 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
Publication year - 2019
Publication title -
nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.853
H-Index - 488
eISSN - 1530-6992
pISSN - 1530-6984
DOI - 10.1021/acs.nanolett.9b00596
Subject(s) - skyrmion , nanoscopic scale , condensed matter physics , hall effect , magnetic field , materials science , magnetic force microscope , oxide , magnetic storage , nanostructure , nanotechnology , physics , magnetization , quantum mechanics , metallurgy
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 SrIrO 3 /SrRuO 3 (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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