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Square and rhombic lattices of magnetic skyrmions in a centrosymmetric binary compound

Type of publication Peer-reviewed
Publikationsform Original article (peer-reviewed)
Author Takagi Rina, Matsuyama Naofumi, Ukleev Victor, Yu Le, White Jonathan S., Francoual Sonia, Mardegan José R. L., Hayami Satoru, Saito Hiraku, Kaneko Koji, Ohishi Kazuki, Ōnuki Yoshichika, Arima Taka-hisa, Tokura Yoshinori, Nakajima Taro, Seki Shinichiro,
Project Discovery and Nanoengineering of Novel Skyrmion-hosting Materials
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Original article (peer-reviewed)

Journal Nature Communications
Volume (Issue) 13(1)
Page(s) 1472 - 1472
Title of proceedings Nature Communications
DOI 10.1038/s41467-022-29131-9

Open Access

URL http://doi.org/10.1038/s41467-022-29131-9
Type of Open Access Publisher (Gold Open Access)

Abstract

Abstract Magnetic skyrmions are topologically stable swirling spin textures with particle-like character, and have been intensively studied as a candidate of high-density information bit. While magnetic skyrmions were originally discovered in noncentrosymmetric systems with Dzyaloshinskii-Moriya interaction, recently a nanometric skyrmion lattice has also been reported for centrosymmetric rare-earth compounds, such as Gd 2 PdSi 3 and GdRu 2 Si 2 . For the latter systems, a distinct skyrmion formation mechanism mediated by itinerant electrons has been proposed, and the search of a simpler model system allowing for a better understanding of their intricate magnetic phase diagram is highly demanded. Here, we report the discovery of square and rhombic lattices of nanometric skyrmions in a centrosymmetric binary compound EuAl 4 , by performing small-angle neutron and resonant elastic X-ray scattering experiments. Unlike previously reported centrosymmetric skyrmion-hosting materials, EuAl 4 shows multiple-step reorientation of the fundamental magnetic modulation vector as a function of magnetic field, probably reflecting a delicate balance of associated itinerant-electron-mediated interactions. The present results demonstrate that a variety of distinctive skyrmion orders can be derived even in a simple centrosymmetric binary compound, which highlights rare-earth intermetallic systems as a promising platform to realize/control the competition of multiple topological magnetic phases in a single material.
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