MegaOhm Extraordinary Hall effect in oxidized CoFeB
G. Kopnov, A. Gerber
TL;DR
This paper reports on oxidized CoFeB films exhibiting an extraordinarily high Hall effect resistivity and magnetic sensitivity, surpassing previous ferromagnetic and semiconductor materials, respectively, indicating potential for advanced magnetic sensing applications.
Contribution
The study introduces a controllably oxidized CoFeB film with unprecedented Hall effect resistivity and sensitivity, advancing the understanding of ferromagnetic material properties.
Findings
EHE resistivity exceeds 1 Ohmcm
Magnetic field sensitivity up to 10^6 Ohm/T
Resistivity four orders higher than previous ferromagnets
Abstract
We report on development of controllably oxidized CoFeB ferromagnetic films demonstrating the extraordinary Hall effect (EHE) resistivity exceeding 1 Ohmcm and magnetic field sensitivity up to 10^6 Ohm/T. Such EHE resistivity is four orders of magnitude higher than previously observed in ferromagnetic materials, while sensitivity is two orders larger than the best of semiconductors
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Taxonomy
TopicsMagnetic properties of thin films · Iron-based superconductors research · ZnO doping and properties