Resonant Elastic X-Ray Scattering of Antiferromagnetic Superstructures in EuPtSi3

Wolfgang Simeth, Andreas Bauer, Christian Franz, Aisha Aqeel, Pablo J. Bereciartua, Jennifer A. Sears, Sonia Francoual, Christian H. Back, Christian Pfleiderer

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

We report resonant elastic x-ray scattering of long-range magnetic order in EuPtSi3, combining different scattering geometries with full linear polarization analysis to unambiguously identify magnetic scattering contributions. At low temperatures, EuPtSi3 stabilizes type A antiferromagnetism featuring various long-wavelength modulations. For magnetic fields applied in the hard magnetic basal plane, well-defined regimes of cycloidal, conical, and fanlike superstructures may be distinguished that encompass a pocket of commensurate type A order without superstructure. For magnetic field applied along the easy axis, the phase diagram comprises the cycloidal and conical superstructures only. Highlighting the power of polarized resonant elastic x-ray scattering, our results reveal a combination of magnetic phases that suggest a highly unusual competition between antiferromagnetic exchange interactions with Dzyaloshinsky-Moriya spin-orbit coupling of similar strength.

Original languageEnglish
Article number266701
JournalPhysical Review Letters
Volume130
Issue number26
DOIs
StatePublished - 30 Jun 2023

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