Three-dimensional sensing of the magnetic-field vector by a compact planar-type Hall device

Author:

Shiogai JunichiORCID,Fujiwara KoheiORCID,Nojima TsutomuORCID,Tsukazaki AtsushiORCID

Abstract

AbstractSmart society is forthcoming with a rapid development in the automation of electric appliances requiring abundant sensors. One of the key sensors is a three-dimensional magnetometer for detecting the motion of objects, which is usually driven by cooperative multiple sensors on three orthogonal planes. Here, we demonstrate the fundamental operation of a three-dimensional magnetometer based on a simple Fe-Sn heterostructure Hall device in a planar geometry. Polar coordinates of the magnetic-field vector are uniquely determined by the combination of the sizable anomalous Hall effect, the anisotropic magnetoresistance, and the unidirectional magnetoresistance. Thanks to the ferromagnetic topological features in the Fe-Sn heterostructure, the above-mentioned device overcomes the limitation of conventional semiconductor devices and is highly sensitive even at room temperature. The compact planar geometry will be particularly useful in versatile electrical applications requiring a low-cost three-dimensional magnetometer with space- and energy-saving features.

Funder

MEXT | JST | Core Research for Evolutional Science and Technology

Publisher

Springer Science and Business Media LLC

Subject

General Medicine

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