Nanowerk July 16, 2024
Researchers in Germany demonstrated that not just individual bits, but entire bit sequences can be stored in cylindrical domains. They used high perpendicular magnetic anisotropy synthetic antiferromagnets in the form of multilayer-based metamaterials whose antiferromagnetic interlayer exchanged energy was purposefully reduced below the out-of-plane demagnetization energy controlling magnetic domain formation. They demonstrated via macroscopic magnetometry and microscopic Lorentz transmission electron microscopy, that it was possible to stabilize nanometer-scale stripe and bubble textures consisting of ferromagnetic out-of-plane domain cores separated by antiferromagnetic in-plane Bloch-type domain walls. According to the researchers this coexistence of mixed ferromagnetic/antiferromagnetic order on the nanometer scale opens unexplored perspectives in the architecture of magnetic domain landscapes as well as the design and functionality of individual magnetic textures, such as bubble domains with depth-wise alternating chirality… read more. Open Access TECHNICAL ARTICLEÂ
Comparison of magnetic states in PMA-SAFs and PMA-FM systems… Credit: Advanced Electronic Materials, 13 May 2024