Observation of Nanoscale Skyrmions in SrIrO3/SrRuO3 Bilayers.
- Meng KY Department of Physics , The Ohio State University , Columbus , Ohio 43210 , United States.
- Ahmed AS Department of Physics , The Ohio State University , Columbus , Ohio 43210 , United States.
- Baćani M Empa , Swiss Federal Laboratories for Materials Science and Technology , Dübendorf CH-8600 , Switzerland.
- Mandru AO Empa , Swiss Federal Laboratories for Materials Science and Technology , Dübendorf CH-8600 , Switzerland.
- Zhao X Empa , Swiss Federal Laboratories for Materials Science and Technology , Dübendorf CH-8600 , Switzerland.
- Bagués N Center for Electron Microscopy and Analysis , The Ohio State University , Columbus , Ohio 43210 , United States.
- Esser BD Center for Electron Microscopy and Analysis , The Ohio State University , Columbus , Ohio 43210 , United States.
- Flores J Department of Physics , The Ohio State University , Columbus , Ohio 43210 , United States.
- McComb DW Center for Electron Microscopy and Analysis , The Ohio State University , Columbus , Ohio 43210 , United States.
- Hug HJ Empa , Swiss Federal Laboratories for Materials Science and Technology , Dübendorf CH-8600 , Switzerland.
- Yang F Department of Physics , The Ohio State University , Columbus , Ohio 43210 , United States.
- 2019-04-03
Published in:
- Nano letters. - 2019
English
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.
- Language
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- English
- Open access status
- green
- Identifiers
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- DOI 10.1021/acs.nanolett.9b00596
- PMID 30935207
- Persistent URL
- https://folia.unifr.ch/global/documents/11331
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