Figure 2 (IMAGE) Tohoku University Caption Cross-sectional transmission electron microscope images of the fabricated MTJs and their film stacks. Varying the number of CoFeB/MgO layers and the CoFeB thickness can tailor MTJ performance for retention-critical to speed-critical applications. Credit Junta Igarashi, Butsurin Jinnai, and Shunsuke Fukami 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.