Figure 1 (IMAGE) Tohoku University Caption A: Sample stack of a spin valve consisting of the reference layer (bottom, red layer), a Cu spacer (middle, yellow layer) and the free layer (top, blue layer). Values in parentheses are the layer thicknesses in nanometres. B: Magnetization dynamics of the free layer in the studied spin valve. Credit Junta Igarashi and Stéphane Mangin Usage Restrictions Reporters may use freely these materials in news coverage with appropriate credit information. License Original 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.