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  • Title: Observation of Nanoscale Skyrmions in SrIrO3/SrRuO3 Bilayers.
    Author: Meng KY, Ahmed AS, Baćani M, Mandru AO, Zhao X, Bagués N, Esser BD, Flores J, McComb DW, Hug HJ, Yang F.
    Journal: Nano Lett; 2019 May 08; 19(5):3169-3175. PubMed ID: 30935207.
    Abstract:
    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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