|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||2018 Technical Division Student Poster Competition
||SPG-6: Characterization of Magnetic Microstructure in Co-Pt Nano-chessboards
||Isha Kashyap, Marc De Graef
|On-Site Speaker (Planned)
Characterization plays a vital role in understanding structure-property relationships in materials. In this work, we utilize Lorentz Transmission Electron Microscopy (LTEM) in combination with micromagnetic simulations, to characterize the magnetic domain microstructure of a novel nanocomposite material obtained through eutectoid decomposition of the Co40Pt60 FCC parent phase into two ordered phases: L10 (CoPt) and L12 (CoPt3). L10 is a hard magnetic phase (M//) while L12 is a soft magnetic phase, and they are arranged in a nano-chessboard pattern. The high coercivity (Hc) of the hard magnetic phase combined with the high saturation magnetization (Ms) of the soft magnetic phase via exchange coupling could yield optimum magnetic properties desirable for permanent magnets and high-density magnetic storage media. A phase reconstruction method based on the Transport of Intensity equation is employed to extract quantitative information, including direction of magnetic induction and magnetic domain wall width, from the Lorentz TEM images.