Anisotropy-driven interfacial magnetism in Ru-deficient SrRuO$_3$ thin films
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
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2026
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| author | Lima, Vítor A. de Oliveira Faley, Michael I. Qdemat, Asmaa Lauter, Valeria Ambaye, Haile Concepción, Omar Singh, Ankita Kentzinger, Emmanuel Radovic, Milan Nandi, Shibrabata Brückel, Thomas Bednarski-Meinke, Connie |
| author_facet | Lima, Vítor A. de Oliveira Faley, Michael I. Qdemat, Asmaa Lauter, Valeria Ambaye, Haile Concepción, Omar Singh, Ankita Kentzinger, Emmanuel Radovic, Milan Nandi, Shibrabata Brückel, Thomas Bednarski-Meinke, Connie |
| contents | While stoichiometric SrRuO$_3$ (SRO) is a metallic itinerant ferromagnet with relatively homogeneous magnetization, Ru deficiency provides a powerful route to alter its electronic transport and depth-dependent magnetic properties. Ru-deficient SRO thin films grown by radio-frequency high oxygen pressure sputtering were investigated using a combination of X-ray reflectivity, polarized neutron reflectometry, off-specular neutron scattering, scanning transmission electron microscopy with energy-dispersive X-ray spectroscopy, electrical transport, and magnetometry. Structural and compositional analyses reveal that Ru deficiency is intrinsic to the films, with an enhanced deficiency at the interfaces. As a result, coherent electronic transport is suppressed and the saturation magnetization is reduced, while the Curie temperature remains largely unaffected, placing Ru-deficient SRO in a regime consistent with ferromagnetic insulator-like behavior. Depth- and lateral-resolved magnetic measurements further show that the interfacial regions remain ferromagnetic but exhibit enhanced perpendicular magnetic anisotropy, which constrains the local magnetization to remain predominantly out-of-plane and strongly reduces its in-plane projection. Our results establish Ru deficiency as a key control parameter governing transport, magnetization, and anisotropy in SRO thin films and highlight defect and interface engineering as powerful routes to tailor interfacial magnetism in correlated oxide heterostructures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_14932 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Anisotropy-driven interfacial magnetism in Ru-deficient SrRuO$_3$ thin films Lima, Vítor A. de Oliveira Faley, Michael I. Qdemat, Asmaa Lauter, Valeria Ambaye, Haile Concepción, Omar Singh, Ankita Kentzinger, Emmanuel Radovic, Milan Nandi, Shibrabata Brückel, Thomas Bednarski-Meinke, Connie Materials Science Strongly Correlated Electrons While stoichiometric SrRuO$_3$ (SRO) is a metallic itinerant ferromagnet with relatively homogeneous magnetization, Ru deficiency provides a powerful route to alter its electronic transport and depth-dependent magnetic properties. Ru-deficient SRO thin films grown by radio-frequency high oxygen pressure sputtering were investigated using a combination of X-ray reflectivity, polarized neutron reflectometry, off-specular neutron scattering, scanning transmission electron microscopy with energy-dispersive X-ray spectroscopy, electrical transport, and magnetometry. Structural and compositional analyses reveal that Ru deficiency is intrinsic to the films, with an enhanced deficiency at the interfaces. As a result, coherent electronic transport is suppressed and the saturation magnetization is reduced, while the Curie temperature remains largely unaffected, placing Ru-deficient SRO in a regime consistent with ferromagnetic insulator-like behavior. Depth- and lateral-resolved magnetic measurements further show that the interfacial regions remain ferromagnetic but exhibit enhanced perpendicular magnetic anisotropy, which constrains the local magnetization to remain predominantly out-of-plane and strongly reduces its in-plane projection. Our results establish Ru deficiency as a key control parameter governing transport, magnetization, and anisotropy in SRO thin films and highlight defect and interface engineering as powerful routes to tailor interfacial magnetism in correlated oxide heterostructures. |
| title | Anisotropy-driven interfacial magnetism in Ru-deficient SrRuO$_3$ thin films |
| topic | Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2602.14932 |