Investigation of Co/Ag Discontinuous Multilayers Prepared by UHV Electron Beam Evaporation
Co/Ag multilayers with 20 bilayers with the composition, Ti(5 nm) [Co(1 nm)/Ag(4 nm)]20 Ti(5 nm), were deposited by electron beam evaporation in ultrahigh vacuum and annealed under vacuum to develop the discontinuous multilayer structure. The as-deposited and annealed multilayers show (111) texturin...
Main Authors: | , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Informatics Publishing Limited & Indian Society for Surface Science and Technology (ISSST)
2015
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Subjects: | |
Online Access: | https://www.informaticsjournals.com/index.php/jsst/article/view/1968 https://doi.org/10.18311/jsst/2006/1968 |
Summary: | Co/Ag multilayers with 20 bilayers with the composition, Ti(5 nm) [Co(1 nm)/Ag(4 nm)]20 Ti(5 nm), were deposited by electron beam evaporation in ultrahigh vacuum and annealed under vacuum to develop the discontinuous multilayer structure. The as-deposited and annealed multilayers show (111) texturing with both Co and Ag (111) peaks in the XRD. The magnetization curves have ferromagnetic behaviour which gradually change on annealing above 200°C to show a reduction of squareness and an increase in coercivity, a reflection of the microstructural changes involving breaking of layers to form the so called discontinuous multilayer (DML) structure. Magnetoresistance curves show increase in MR value with annealing that attains a constant value above 300°C presumably due to stagnation in growth of Co grains which are surrounded by Ag atoms. |
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