Bulletin of the American Physical Society
APS March Meeting 2021
Volume 66, Number 1
Monday–Friday, March 15–19, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session A40: Skyrmions in Two Dimensional Systems
8:00 AM–10:48 AM,
Monday, March 15, 2021
Sponsoring
Units:
GMAG DMP
Chair: Lisa DeBeer-Schmitt, Oak Ridge National Lab
Abstract: A40.00001 : Non-collinear magnetism and zero-field skyrmions in all-light-metal multilayers*
8:00 AM–8:36 AM
Live
Presenter:
Roberto Lo Conte
(Department of Physics, University of Hamburg, Hamburg, Germany)
Authors:
Roberto Lo Conte
(Department of Physics, University of Hamburg, Hamburg, Germany)
Ashis K. Nandy
(School of Physical Sciences, National Institute of Science Education and Research, HBNI, P.O. Jatni, 752050, India)
Gong Chen
(Physics Department, Georgetown University, Washington, DC, USA)
Andre L. Fernandes Cauduro
(National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA)
Ajanta Maity
(School of Physical Sciences, National Institute of Science Education and Research, HBNI, P.O. Jatni, 752050, India)
Colin Ophus
(National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA)
Zhijie Chen
(Physics Department, Georgetown University, Washington, DC, USA)
Alpha N'Diaye
(Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, USA)
Hongxin Yang
(Ningbo Institute of Materials Technology and Engineering, CAS, Ningbo, China)
Kai Liu
(Physics Department, Georgetown University, Washington, DC, USA)
Andreas Schmid
(National Center for Electron Microscopy, Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA, USA)
Roland Wiesendanger
(Department of Physics, University of Hamburg, Hamburg, Germany)
Here, I will first discuss the observation of magnetic domain walls with uni-directional sense of rotation in [light-metal]\ferromagnet multilayers. Density functional theory calculations allows us to understand the origin and predict the strength of the DMI in those systems, which compares well with experimental values. Subsequently, I will discuss how such systems can be employed for the stabilization of isolated magnetic skyrmions at room temperature and zero magnetic field via interlayer exchange coupling (IEC) [4,5]. By carefully adjusting the IEC in the system we can tune the size of the observed skyrmions. Those findings open up the possibility to develop cost-effective skyrmion-based spintronic devices suitable for general-user applications which go beyond modern nanoelectronics.
[1] N. Romming et al., Science 341, 636 (2013).
[2] C. Moreau-Luchaire et al., Nat. Nanotechnol. 11, 444 (2016).
[3] A. Soumyanarayanan et al., Nat. Mater. 16, 898 (2017).
[4] G. Chen et al., Appl. Phys. Lett. 106, 242404 (2015).
[5] R. Lo Conte et al., Nano Lett. 20, 4739 (2020).
*EU Marie Curie Fellow (748006-SKDWONTRACK); ARPA-E (DE-AR0000664); US DoE Early Career Research Program; US NSF (DMR-1610060, DMR-1905468, DMR-1828420); UCOP (MRP-17-454963); Department of Atomic Energy, Government of India; US DoE (DE-AC02-05CH11231)
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