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| Pàgina inicial > Articles > Articles publicats > Strain Relief and Domain Architecture in Epitaxial NiO Films on La2/3Sr1/3MnO3/SrTiO3 for Spin-Transport Engineering |
| Data: | 2025 |
| Resum: | This study reports on the epitaxial growth and structural characterization of ultrathin NiO-films deposited by magnetron sputtering on LaSrMnO (LSMO) films grown on SrTiO (STO) substrates with (001)- and (111)-orientations. X-ray diffraction and atomic-force microscopy show that all NiO layers are single-phase, face-centered pseudo-cubic, atomically smooth, root-main-square (RMS) surface roughness <0. 15 nm, and form abrupt interfaces with LSMO. High-resolution reciprocal-space maps reveal that the films are largely relaxed, but exhibit a slight compressive distortion, yielding unit-cell volumes larger than bulk NiO. Despite a nominal ≈7% lattice mismatch, aberration-corrected scanning transmission electron microscopy uncovers an array of misfit dislocations at the NiO/LSMO interface that help to accommodate strain allowing epitaxial growth of NiO layers. On (001)-oriented samples, the four antiferromagnetic T-domains are oblique to the sample plane, while on the (111) case, one lies in-plane. This in-plane domain shows greater spacing between ferromagnetic (111) planes due to unit cell distortion. This structural domain splitting can influence magnetic order and spin transmission efficiency, highlighting crystallographic orientation as a key factor in designing high-performance spintronic devices. |
| Ajuts: | Agencia Estatal de Investigación CEX2023-001263-S Agencia Estatal de Investigación CEX2023-001286-S Agencia Estatal de Investigación PID2021-128410OB-I00 Agencia Estatal de Investigación PID2020-112914RB-I00 Agencia Estatal de Investigación PID2021-124680OB-I00 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | Antiferromagnets ; Complex oxides heterostructures ; Epitaxial strain ; Synchrotron radiation techniques ; Thin films |
| Publicat a: | Advanced materials interfaces, Vol. 12, Issue 16 (August 2025) , art. e00452, ISSN 2196-7350 |
16 p, 8.0 MB |