Extrinsic tunnel Hall effect in CoFeB/MgO/Pt junctions
Abstract
The Hall effect that occurs when current flows through a CoFeB/MgO/Pt tunnel junction is investigated. It is shown that the transverse voltage in Pt electrode is nonlinear on a DC voltage applied to the tunnel junction. It has both linear (odd) and quadratic (even) parts. The linear part contains well-known contributions of the anomalous Hall effect in the ferromagnetic electrode, inverse spin-hall effect in platinum and others. The quadratic part is a phenomenon caused by the spin-orbit scattering of electrons in an external electric field induced by a voltage applied to the barrier. This field reaches values of V/m which is close to internal atomic fields. The magnitude of both effects decreases as thickness of Pt electrode is increased due to shunting effects.
Cite
@article{arxiv.2206.10264,
title = {Extrinsic tunnel Hall effect in CoFeB/MgO/Pt junctions},
author = {I. Yu. Pashenkin and M. V. Sapozhnikov and N. S. Gusev and E. A. Karashtin and A. A. Fraerman},
journal= {arXiv preprint arXiv:2206.10264},
year = {2025}
}
Comments
5 pages, 5 figures