Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3
Abstract Cu2OSeO3 is a chiral magnet with a rich phase diagram. The positions of the phase transitions are sensitive to chemical substitution; however, the exact mechanism by which dopants influence magnetic behaviour remains elusive. In this work, Cu2OSe1−x Te x O3 with (0 ≤ x ≤ 0.1) is synthesised...
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Nature Portfolio
2025-04-01
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| Series: | Communications Materials |
| Online Access: | https://doi.org/10.1038/s43246-025-00804-4 |
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| author | Alexander J. Ferguson Marco Vás Edalyn J. Vella Md Firoz Pervez Elliot P. Gilbert Clemens Ulrich Samuel Yick Tilo Söhnel |
| author_facet | Alexander J. Ferguson Marco Vás Edalyn J. Vella Md Firoz Pervez Elliot P. Gilbert Clemens Ulrich Samuel Yick Tilo Söhnel |
| author_sort | Alexander J. Ferguson |
| collection | DOAJ |
| description | Abstract Cu2OSeO3 is a chiral magnet with a rich phase diagram. The positions of the phase transitions are sensitive to chemical substitution; however, the exact mechanism by which dopants influence magnetic behaviour remains elusive. In this work, Cu2OSe1−x Te x O3 with (0 ≤ x ≤ 0.1) is synthesised with the lattice expanding upon Te inclusion. Our SANS and magnetometry data indicate that doping lowers the paramagnetic to helical ordering temperature and the critical field required for the conical to field-polarised phase transition. We present a universality class analysis on the materials using the Heatmap Modified Iteration Method to evaluate the critical behaviour and show that the Heisenberg to Ising transition is robust to chemical doping. However, we demonstrate that the inclusion of Te decreases both the strengths of the Dzyaloshinskii-Moriya and Symmetric Exchange Interactions. This led to an expansion of the skyrmion region and decreased both the critical temperature and field. |
| format | Article |
| id | doaj-art-d2de14b5fe674d0dbcfdad9fcedabe93 |
| institution | Kabale University |
| issn | 2662-4443 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Communications Materials |
| spelling | doaj-art-d2de14b5fe674d0dbcfdad9fcedabe932025-08-20T03:52:23ZengNature PortfolioCommunications Materials2662-44432025-04-016111110.1038/s43246-025-00804-4Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3Alexander J. Ferguson0Marco Vás1Edalyn J. Vella2Md Firoz Pervez3Elliot P. Gilbert4Clemens Ulrich5Samuel Yick6Tilo Söhnel7School of Chemical Sciences, The University of AucklandSchool of Chemical Sciences, The University of AucklandSchool of Chemical Sciences, The University of AucklandSchool of Physics, University of New South WalesAustralian Centre for Neutron Scattering, ANSTOSchool of Physics, University of New South WalesSchool of Chemical Sciences, The University of AucklandSchool of Chemical Sciences, The University of AucklandAbstract Cu2OSeO3 is a chiral magnet with a rich phase diagram. The positions of the phase transitions are sensitive to chemical substitution; however, the exact mechanism by which dopants influence magnetic behaviour remains elusive. In this work, Cu2OSe1−x Te x O3 with (0 ≤ x ≤ 0.1) is synthesised with the lattice expanding upon Te inclusion. Our SANS and magnetometry data indicate that doping lowers the paramagnetic to helical ordering temperature and the critical field required for the conical to field-polarised phase transition. We present a universality class analysis on the materials using the Heatmap Modified Iteration Method to evaluate the critical behaviour and show that the Heisenberg to Ising transition is robust to chemical doping. However, we demonstrate that the inclusion of Te decreases both the strengths of the Dzyaloshinskii-Moriya and Symmetric Exchange Interactions. This led to an expansion of the skyrmion region and decreased both the critical temperature and field.https://doi.org/10.1038/s43246-025-00804-4 |
| spellingShingle | Alexander J. Ferguson Marco Vás Edalyn J. Vella Md Firoz Pervez Elliot P. Gilbert Clemens Ulrich Samuel Yick Tilo Söhnel Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3 Communications Materials |
| title | Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3 |
| title_full | Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3 |
| title_fullStr | Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3 |
| title_full_unstemmed | Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3 |
| title_short | Skyrmion stabilisation and critical behaviour in tellurium-doped Cu2OSeO3 |
| title_sort | skyrmion stabilisation and critical behaviour in tellurium doped cu2oseo3 |
| url | https://doi.org/10.1038/s43246-025-00804-4 |
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