Imaging the spin chirality of ferrimagnetic Néel skyrmions stabilized on topological antiferromagnetic Mn3Sn
Abstract
Néel skyrmions are generally realized in asymmetric multilayers made of heavy metals (HMs) and ultrathin ferromagnets possessing strong interfacial Dzyaloshinskii-Moriya interactions (iDMIs). Depending on the relative strengths of iDMIs at the interfaces, various types of Néel skyrmions have been suggested, which are typified with characteristically different topological properties and current-driven dynamics. This suggests the importance of a precise quantification of their spin chiralities. In this paper, we explore the possibility of realizing Néel skyrmions in magnetic multilayers without the direct usage of standard HMs. Specifically, through depositing a thin layer of ferrimagnetic (FIM) CoTb layer on top of an antiferromagnetic (AFM) quantum material of composition Mn3Sn, the AFM exchange interaction at the asymmetric interface provides an equivalent iDMI for stabilizing FIM Néel skyrmions. Secondly, through using advanced four-dimensional Lorentz scanning transmission electron microscopy (4D LSTEM), in combination with x-ray magnetic circular dichroism photoemission electron microscopy (XMCD-PEEM), we can directly determine the spin chirality of FIM Néel skyrmions. Finally, the present findings not only broaden the phase space for chiral interfacial magnetism but also provide a possibility for future applications of heavy-metal-free skyrmionic devices.
- Authors:
-
[1];
[2];
[1];
[1];
[4];
[4];
[1]
- Tsinghua Univ., Beijing (China)
- Cornell Univ., Ithaca, NY (United States)
- ALBA Synchrotron Light Source, Barcelona (Spain)
- Paul Scherrer Inst. (PSI), Villigen (Switzerland)
- Foundation for Research and Technology - Hellas (FORTH), Crete (Greece)
- Univ. of Messina (Italy)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE; National Key Research and Development Program of China; National Natural Science Foundation of China (NSFC); Beijing Natural Science Foundation; Defense Advanced Research Projects Agency (DARPA); National Science Foundation (NSF); Swiss National Science Foundation (SNSF); Swiss Nanoscience Institute; Korea government; Hellenic Foundation for Research and Innovation (HFRI); General Secretariat for Research and Technology (GSRT)
- OSTI Identifier:
- 1821152
- Grant/Contract Number:
- AC02-05CH11231; 2017YFA0206200; 51788104; 2016YFA0302300; 11774194; 51831005; 1181101082; 11804182; Z190009; TEE-D18AC00009; DMR-1539918; DMR-1719875; 200021-160186; 2019R1A2C2002996; NRF-2016M3D1A1027831; NRF-2019K1A3A7A09033400; 871
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Materials
- Additional Journal Information:
- Journal Volume: 5; Journal Issue: 8; Journal ID: ISSN 2475-9953
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; magnetic texture; magnetism; spintronics
Citation Formats
Xu, Teng, Chen, Zhen, Zhou, Heng-An, Wang, Zidong, Dong, Yiqing, Aballe, Lucia, Foerster, Michael, Gargiani, Pierluigi, Valvidares, Manuel, Bracher, David M., Savchenko, Tatiana, Kleibert, Armin, Tomasello, Riccardo, Finocchio, Giovanni, Je, Soong-Guen, Im, Mi-Young, Muller, David A., and Jiang, Wanjun. Imaging the spin chirality of ferrimagnetic Néel skyrmions stabilized on topological antiferromagnetic Mn3Sn. United States: N. p., 2021.
Web. doi:10.1103/physrevmaterials.5.084406.
Xu, Teng, Chen, Zhen, Zhou, Heng-An, Wang, Zidong, Dong, Yiqing, Aballe, Lucia, Foerster, Michael, Gargiani, Pierluigi, Valvidares, Manuel, Bracher, David M., Savchenko, Tatiana, Kleibert, Armin, Tomasello, Riccardo, Finocchio, Giovanni, Je, Soong-Guen, Im, Mi-Young, Muller, David A., & Jiang, Wanjun. Imaging the spin chirality of ferrimagnetic Néel skyrmions stabilized on topological antiferromagnetic Mn3Sn. United States. https://doi.org/10.1103/physrevmaterials.5.084406
Xu, Teng, Chen, Zhen, Zhou, Heng-An, Wang, Zidong, Dong, Yiqing, Aballe, Lucia, Foerster, Michael, Gargiani, Pierluigi, Valvidares, Manuel, Bracher, David M., Savchenko, Tatiana, Kleibert, Armin, Tomasello, Riccardo, Finocchio, Giovanni, Je, Soong-Guen, Im, Mi-Young, Muller, David A., and Jiang, Wanjun. Fri .
"Imaging the spin chirality of ferrimagnetic Néel skyrmions stabilized on topological antiferromagnetic Mn3Sn". United States. https://doi.org/10.1103/physrevmaterials.5.084406. https://www.osti.gov/servlets/purl/1821152.
@article{osti_1821152,
title = {Imaging the spin chirality of ferrimagnetic Néel skyrmions stabilized on topological antiferromagnetic Mn3Sn},
author = {Xu, Teng and Chen, Zhen and Zhou, Heng-An and Wang, Zidong and Dong, Yiqing and Aballe, Lucia and Foerster, Michael and Gargiani, Pierluigi and Valvidares, Manuel and Bracher, David M. and Savchenko, Tatiana and Kleibert, Armin and Tomasello, Riccardo and Finocchio, Giovanni and Je, Soong-Guen and Im, Mi-Young and Muller, David A. and Jiang, Wanjun},
abstractNote = {Néel skyrmions are generally realized in asymmetric multilayers made of heavy metals (HMs) and ultrathin ferromagnets possessing strong interfacial Dzyaloshinskii-Moriya interactions (iDMIs). Depending on the relative strengths of iDMIs at the interfaces, various types of Néel skyrmions have been suggested, which are typified with characteristically different topological properties and current-driven dynamics. This suggests the importance of a precise quantification of their spin chiralities. In this paper, we explore the possibility of realizing Néel skyrmions in magnetic multilayers without the direct usage of standard HMs. Specifically, through depositing a thin layer of ferrimagnetic (FIM) CoTb layer on top of an antiferromagnetic (AFM) quantum material of composition Mn3Sn, the AFM exchange interaction at the asymmetric interface provides an equivalent iDMI for stabilizing FIM Néel skyrmions. Secondly, through using advanced four-dimensional Lorentz scanning transmission electron microscopy (4D LSTEM), in combination with x-ray magnetic circular dichroism photoemission electron microscopy (XMCD-PEEM), we can directly determine the spin chirality of FIM Néel skyrmions. Finally, the present findings not only broaden the phase space for chiral interfacial magnetism but also provide a possibility for future applications of heavy-metal-free skyrmionic devices.},
doi = {10.1103/physrevmaterials.5.084406},
journal = {Physical Review Materials},
number = 8,
volume = 5,
place = {United States},
year = {Fri Aug 13 00:00:00 EDT 2021},
month = {Fri Aug 13 00:00:00 EDT 2021}
}
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