Tunable perpendicular anisotropic magnetoresistance in CoO/Co/Pt heterostructures
| Autor: | Q. Zhan, Guang Yang, Qian-Qian Liu, Guonan Feng, Minghua Li, Guanghua Yu, Jing-Yan Zhang, Chun Feng |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Condensed matter physics Magnetoresistance Scattering Metals and Alloys Heterojunction 02 engineering and technology Electronic structure 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Physical property X-ray photoelectron spectroscopy 0103 physical sciences Proximity effect (audio) Materials Chemistry Perpendicular Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology |
| Zdroj: | Rare Metals. 42:579-584 |
| ISSN: | 1867-7185 1001-0521 |
| Popis: | Transport properties of magnetron-sputtered CoO/Co/Pt heterostructures were investigated by physical property measurement system. Different types of magnetoresistance are observed in the heterostructures, including isotropic anisotropic magnetoresistance (AMR), AMR with geometric size effect, and interfacial effect. A reversal in sign of perpendicular AMR is found in the film CoO(3 nm)/Co(3 nm)/Pt(3 nm) compared to the film CoO(3 nm)/Co(3 nm)/CoO(3 nm), which is associated with Pt. Moreover, perpendicular AMR is tunable in the films CoO(3 nm)/Co(3 nm)/CoO(t)/Pt(3 nm) and CoO(3 nm)/Co(3 nm)/Pt(t)/CoO(3 nm) at will, with either positive or negative value, by varying the inserting layer thickness. The electronic structure information of the samples was measured by X-ray photoelectron spectroscopy (XPS). The spin-related transport and XPS results manifest that magnetic proximity effect, surface scattering, together with oxygen migration contribute to the tunable function of Pt. |
| Databáze: | OpenAIRE |
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