Formation and anisotropic magnetoresistance of Co/Pt nano-contacts through aluminum oxide barrier

Muftah Al-Mahdawi; Masashi Sahashi

doi:10.1063/1.4862462

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arXiv · 1312.4061

Formation and anisotropic magnetoresistance of Co/Pt nano-contacts through aluminum oxide barrier

Muftah Al-Mahdawi·Masashi Sahashi

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Abstract

We report on the observation of anisotropic magnetoresistance (AMR) in vertical asymmetric nano-contacts (NCs) made through AlO$_x$ nano-oxide layer (NOL) formed by ion-assisted oxidation method in the film stack of Co/AlO$_x$-NOL/Pt. Analysis of NC formation was based on \emph{in situ} conductive atomic force microscopy and transmission electron microscopy. Depending on the purity of NCs from Al contamination, we observed up to 29% AMR ratio at room temperature.

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Muftah Al-Mahdawi, Masashi Sahashi. 2013-12-14. Formation and anisotropic magnetoresistance of Co/Pt nano-contacts through aluminum oxide barrier. https://doi.org/10.1063/1.4862462

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