Tilted spin current generated by the collinear antiferromagnet ruthenium dioxide

Symmetry plays a central role in determining the polarization of spin currents induced by electric fields. It also influences how these generate spin-transfer torques magnetic devices. Here we show that an out-of-plane damping-like torque can be generated ruthenium dioxide (RuO2)/permalloy devices when Néel vector collinear antiferromagnet RuO2 is canted relative to sample plane. By measuring characteristic changes all three components electric-field-induced as function angle field crystal axes, find generates current with well-defined tilted orientation approximately parallel vector. A maximum efficiency per unit 7 ± 1 × 103 ??1 m?1 measured at room temperature. The observed angular dependence indicates this antiferromagnetic Hall effect symmetries are distinct from other mechanisms spin-current generation reported and ferromagnetic materials. (RuO2)