Spontaneous cycloidal order mediating a spin-reorientation transition in a polar metal

Abstract

We show how complex modulated order can spontaneously emerge when magnetic interactions compete in a metal with polar lattice distortions. Combining neutron and resonant x-ray scattering with symmetry analysis, we reveal that the spin reorientation in Ca${}_3$Ru${}_2$O${}_7$ is mediated by a magnetic cycloid whose eccentricity evolves smoothly but rapidly with temperature. We find the cycloid to be highly sensitive to magnetic fields, which appear to continuously generate higher harmonic modulations. Our results provide a unified picture of the rich magnetic phases of this correlated, multi-band polar metal.

arXiv comment6 pages, 4 figures (+ 11 pages, 3 figures of supplemental material)

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Cited by in corpus (3)

• Spin and charge excitations in the correlated multiband metal Ca3Ru2O7
• Strain control of a bandwidth-driven spin reorientation in Ca${}_3$Ru${}_2$O${}_7$
• Field Induced Modulated State in the Ferromagnet PrPtAl