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arXiv · 2002.10132

Noncollinear magnetic structure in U2Pd2In at high magnetic fields

K. Prokes·M. Bartkowiak·D. I. Gorbunov·O. Prokhnenko·O. Rivin·P. Smeibidl
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Abstract

We report an unexpected magnetic-field-driven magnetic structure in the 5f-electron Shastry- Sutherland system U2Pd2In. This phase develops at low temperatures from a noncollinear antiferromagnetic ground state above the critical field of 25.8 T applied along the a-axis. All U moments have a net magnetic moment in the direction of the applied field, described by a ferromagnetic propagation vector qF = (0 0 0) and an antiferromagnetic component described by a propagation vector qAF = (0 0.30 1/2 ) due to a modulation in the direction perpendicular to the applied field. We conclude that this surprising noncollinear magnetic structure is due to a competition between the single-ion anisotropy trying to keep moments, similar to the ground state, along the [110]-type directions, Dzyaloshinskii-Moryia interaction forcing them to be perpendicular to each other and application of the external magnetic field attempting to align them along the field direction.

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K. Prokes, M. Bartkowiak, D. I. Gorbunov, O. Prokhnenko, O. Rivin, P. Smeibidl. 2020-02-24. Noncollinear magnetic structure in U2Pd2In at high magnetic fields. https://doi.org/10.1103/physrevresearch.2.013137

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