Spin Diode (IMAGE) Moscow Institute of Physics and Technology Caption Spin diode design: φ denotes the angle between the axes of the two antiferromagnets, drawn in pink, and θ is the angle between the magnetizations of the two ferromagnetic layers, shown in blue. Credit Alexey Khudorozhkov et al./Physical Review B Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.