Revisiting the high-field phase diagram of the topological cubic helimagnet SrFeO$_{3}$
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arXiv
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| Format: | Preprint |
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2026
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| author | Gen, Masaki Okumura, Shun Imajo, Shusaku Nakajima, Taro Prokes, Karel Kitou, Shunsuke Tokunaga, Yusuke Nii, Yoichi Kindo, Koichi Kohama, Yoshimitsu Ishiwata, Shintaro Arima, Taka-hisa |
| author_facet | Gen, Masaki Okumura, Shun Imajo, Shusaku Nakajima, Taro Prokes, Karel Kitou, Shunsuke Tokunaga, Yusuke Nii, Yoichi Kindo, Koichi Kohama, Yoshimitsu Ishiwata, Shintaro Arima, Taka-hisa |
| contents | The cubic perovskite SrFeO$_{3}$ is a prototypical centrosymmetric itinerant magnet that hosts a quadruple-${\mathbf Q}$ hedgehog-antihedgehog lattice and exhibits a complex magnetic-field-temperature phase diagram. Yet, the microscopic mechanism underlying the emergence of its versatile multiple-${\mathbf Q}$ phases remains unresolved. Here, we elucidate the field-orientation dependence of the magnetic phase diagram and establish an effective spin Hamiltonian for SrFeO$_{3}$ that incorporates a cubic single-ion anisotropy together with bilinear and biquadratic interactions in momentum space. In addition, we observe magnetoelastic signatures of a first-order valence transition upon entering the forced FM phase at 40 T, which would be attributed to the suppression of negative charge transfer. These findings emphasize the pivotal importance of electronic itinerancy arising from the formation of a ligand-hole band in stabilizing multiple-${\mathbf Q}$ phases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_22517 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Revisiting the high-field phase diagram of the topological cubic helimagnet SrFeO$_{3}$ Gen, Masaki Okumura, Shun Imajo, Shusaku Nakajima, Taro Prokes, Karel Kitou, Shunsuke Tokunaga, Yusuke Nii, Yoichi Kindo, Koichi Kohama, Yoshimitsu Ishiwata, Shintaro Arima, Taka-hisa Strongly Correlated Electrons The cubic perovskite SrFeO$_{3}$ is a prototypical centrosymmetric itinerant magnet that hosts a quadruple-${\mathbf Q}$ hedgehog-antihedgehog lattice and exhibits a complex magnetic-field-temperature phase diagram. Yet, the microscopic mechanism underlying the emergence of its versatile multiple-${\mathbf Q}$ phases remains unresolved. Here, we elucidate the field-orientation dependence of the magnetic phase diagram and establish an effective spin Hamiltonian for SrFeO$_{3}$ that incorporates a cubic single-ion anisotropy together with bilinear and biquadratic interactions in momentum space. In addition, we observe magnetoelastic signatures of a first-order valence transition upon entering the forced FM phase at 40 T, which would be attributed to the suppression of negative charge transfer. These findings emphasize the pivotal importance of electronic itinerancy arising from the formation of a ligand-hole band in stabilizing multiple-${\mathbf Q}$ phases. |
| title | Revisiting the high-field phase diagram of the topological cubic helimagnet SrFeO$_{3}$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.22517 |