Influence of planar Hall effect on the output signal in a T-shaped spin conversion device

Abstract

The T-shaped spin conversion device consisting of ferromagnetic and spin Hall (or spin conversion) materials is an indispensable component in a new type of logic circuit called a magnetoelectric spin–orbit device. We examine the influence of the planar Hall effect (PHE) on the output signal in the T-shaped device. Angular dependences of decomposed even and odd components in the signal reveal that the PHE causes an even-symmetric component in the output signal because the magnetic moment continuously rotates clockwise (or counterclockwise). Thus, the PHE makes it challenging to detect odd magnetic field responses induced by the inverse spin Hall effect containing the zero-field magnetic state information. We can suppress the adverse effect by choosing a low anisotropic magnetoresistance ferromagnet. This study gives valuable information for designing the optimal T-shaped structure for the magnetoelectric logic device application.