Perpendicularly magnetized Co/Pd-based magneto-resistive heterostructures on flexible substrates
| Autor: | N. Y. Schmidt, Sara Varotto, Christian Rinaldi, S. Laureti, G. Varvaro, Federico Fagiani, Mariam Hassan, Manfred Albrecht, Gianni Barucca |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Resistive touchscreen Materials science Fabrication business.industry General Engineering Bioengineering Heterojunction 02 engineering and technology General Chemistry Surface finish Bending 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Flexible electronics Magnetic anisotropy 0103 physical sciences Optoelectronics ddc:530 General Materials Science 0210 nano-technology business Magneto |
| Zdroj: | Nanoscale Advances. 3:3076-3084 |
| ISSN: | 2516-0230 |
| DOI: | 10.1039/d1na00110h |
| Popis: | Flexible magneto-resistive heterostructures have received a great deal of attention over the past few years as they allow for new product paradigms that are not possible with conventional rigid substrates. While the progress and development of systems with longitudinal magnetic anisotropy on non-planar substrates has been remarkable, flexible magneto-resistive heterostructures with perpendicular magnetic anisotropy (PMA) have never been studied despite the possibility to obtain additional functionality and improved performance. To fill this gap, flexible PMA Co/Pd-based giant magneto-resistive (GMR) spin-valve stacks were prepared by using an innovative transfer-and-bonding strategy exploiting the low adhesion of a gold underlayer to SiOx/Si(100) substrates. The approach allows overcoming the limits of the direct deposition on commonly used polymer substrates, whose high surface roughness and low melting temperature could hinder the growth of complex heterostructures with perpendicular magnetic anisotropy. The obtained PMA flexible spin-valves show a sizeable GMR ratio (∼1.5%), which is not affected by the transfer process, and a high robustness against bending as indicated by the slight change of the magneto-resistive properties upon bending, thus allowing for their integration on curved surfaces and the development of a novel class of advanced devices based on flexible magneto-resistive structures with perpendicular magnetic anisotropy. Besides endowing the family of flexible electronics with PMA magneto-resistive heterostructures, the exploitation of the results might apply to high temperature growth processes and to the fabrication of other functional and flexible multilayer materials engineered at the nanoscale. |
| Databáze: | OpenAIRE |
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