Interface study of FeMgOFe magnetic tunnel junctions using 3D Atom Probe
B.Mazumder, M.Gruber, A.Vella, F.Vurpillot, B. Deconihout
TL;DR
This study investigates the interfaces of Fe/MgO/Fe magnetic tunnel junctions using laser-assisted 3D atom probe analysis, revealing oxide formation at the second interface independent of experimental conditions, explained by simulation of field evaporation.
Contribution
It provides new insights into interface chemistry and oxide formation in Fe/MgO/Fe junctions using advanced 3D atom probe techniques and simulations.
Findings
Oxide formation occurs at the second interface regardless of laser parameters.
Simulation shows field evaporation of two layers causes the observed phenomena.
The oxide formation is independent of laser wavelength, fluence, and barrier thickness.
Abstract
A detailed interface study was conducted on a Fe/MgO/Fe system using laser assisted 3D atom probe. It exhibits an additional oxide formation at the second interface of the multilayer structure independent of laser wavelength, laser fluence and the thickness of the tunnel barrier. We have shown with the help of simulation that this phenomena is caused by the field evaporation of two layers having two different evaporation
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Taxonomy
TopicsAdvanced Materials Characterization Techniques · Diamond and Carbon-based Materials Research · Force Microscopy Techniques and Applications