Spin density waves and ground state helices in EuGa2.4Al1.6 [dataset]

Alba Venero, Diego (ISIS Neutron and Muon Source, UK); Balakrishnan, Geetha (University of Warwick, UK); Parkin, Zachariah (Durham University, UK); Mayoh, Daniel (University of Warwick, UK); Unsworth, Emily (Durham University, UK); Hatton, Peter (Durham University, UK); Francoual, Sonia (DESY, Germany); Moody, Samuel (Paul Scherrer Institute, Switzerland); Littlehales, Matthew (Durham University, UK); Blundell, Toby (Durham University, UK); Bereciartua, Pablo (DESY, Germany)

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Spin density waves and ground state helices in EuGa2.4Al1.6 [dataset] Open Access

The Eu(Ga1−xAlx )4 series is composed of centrosymmetric structures which exhibit a wide range of rich topological phenomena, including some members hosting magnetic skyrmions. In this letter, we investigate the previously unreported intermediate compound EuGa2.4Al1.6, which hosts two distinct phase transitions under zero applied magnetic field. We have used resonant elastic x-ray scattering with full linear polarization analysis to unambiguously determine the zero-field magnetic structures, which consist of a transition between a basal plane transverse spin density wave at higher temperatures into a noncollinear helical ground state. Furthermore, we demonstrate a phase coexistence regime below the transition and reveal an elliptically modulated helical magnetic structure emerging from wavevector splitting.

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Resource type: Dataset
Contributors: Creator: Littlehales, Matthew ¹
Data collector: Moody, Samuel ²
Data collector: Bereciartua, Pablo ³
Data collector: Mayoh, Daniel ⁴
Data collector: Parkin, Zachariah ¹
Data collector: Blundell, Toby ¹
Data collector: Unsworth, Emily ¹
Data collector: Francoual, Sonia ³
Data collector: Balakrishnan, Geetha ⁴
Data collector: Alba Venero, Diego ⁵
Contact person: Hatton, Peter ¹

¹ Durham University, UK
² Paul Scherrer Institute, Switzerland
³ DESY, Germany
⁴ University of Warwick, UK
⁵ ISIS Neutron and Muon Source, UK
Funder: Science and Technology Facilities Council
Engineering and Physical Sciences Research Council
Research methods
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Keyword: Resonant elastic x-ray scattering
Full linear polarisation analysis
Incommensurate magnetism
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Identifier: ark:/32150/r21z40ks89k
doi:10.15128/r21z40ks89k
Rights: Creative Commons Attribution 4.0 International (CC BY)
Publisher: Durham University
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Depositor: M.T. Littlehales
Date Uploaded: 30 June 2024, 02:06:42
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