Atomic‐Scale Detection of Néel Vector Switching in the Single‐Layer A‐Type Antiferromagnet Cr <sub>2</sub> S <sub>3</sub> ‐2D
Abstract
ABSTRACT The detection of Néel vector switching in a single‐layer A‐type antiferromagnet marks an important step toward functional two‐dimensional spintronics. Here, ‐2D, grown on graphene on Ir(110), is established as a first single‐layer A‐type antiferromagnet. Spin‐polarized scanning tunneling microscopy reveals hysteresis loops with a large switching field and a pronounced dependence on island size. X‐ray magnetic circular dichroism at the Cr edges exhibits a tiny signal with a linear magnetic field dependence, consistent with an antiferromagnetic ground state with an estimated net moment below per Cr and a Néel temperature of about 160 K. Quantitative analysis of the island‐size dependence of the switching field, together with first‐principles calculations, indicates a slight imbalance between the magnetic moments of the two Cr planes of ‐2D when supported on a substrate. This imbalance results in a net magnetization for the A‐type antiferromagnet, which enables the 180 rotation of the Néel vector. Moreover, ‐2D retains its magnetic properties after several days of exposure to air.
Article Details
Authors (12)
Affan Safeer
II. Physikalisches Institut Universität zu Köln Köln Germany
Calisa Dias
Institute of Molecular Science University of Valencia Paterna Spain
Mahdi Ghorbani‐Asl
Institute of Ion Beam Physics and Materials Research Helmholtz‐Zentrum Dresden‐Rossendorf Dresden Germany
Abdallah Karaka
II. Physikalisches Institut Universität zu Köln Köln Germany
Pradyumna Bawankule
Institute of Molecular Science University of Valencia Paterna Spain
Weibin Li
State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems; Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs; Engineering Research Center of Grassland Industry, Ministry of Education; College of Pastoral Agriculture Science and Technology, Lanzhou University
Pierluigi Gargiani
Department of Materials ETH Zürich Zürich CH‐8093 Switzerland
Wouter Jolie
II. Physikalisches Institut Universität zu Köln Köln Germany
Arkady V. Krasheninnikov
Institute of Ion Beam Physics and Materials Research Helmholtz‐Zentrum Dresden‐Rossendorf Dresden Germany
Amilcar Bedoya‐Pinto
Institute of Molecular Science University of Valencia Paterna Spain
Thomas Michely
II. Physikalisches Institut Universität zu Köln Köln Germany
Jeison Fischer
II. Physikalisches Institut Universität zu Köln Köln Germany