| AVS 62nd International Symposium & Exhibition | |
| Atom Probe Tomography Focus Topic | Monday Sessions |
| Session AP+AS-MoA |
| Session: | Current and New Research Fields for Applications of Atom Probe Tomography |
| Presenter: | Arun Devaraj, Pacific Northwest National Laboratory |
| Authors: | A. Leary, Carnegie Mellon University V. Degeorge, Carnegie Mellon University V. Keylin, Carnegie Mellon University A. Devaraj, Pacific Northwest National Laboratory J. Cui, Pacific Northwest National Laboratory M. Mchenry, Carnegie Mellon University |
| Correspondent: | Click to Email |
Nanocomposite soft magnetic materials exhibit high magnetization and low coercivity for application in power electronics, motors, and sensors. The composite nature of these materials, created by thermal annealing of rapidly solidified metallic glasses, offers many options to tune desired material properties. Grain sizes below ~30 nm are relevant to average the magnetocrystalline anisotropy between neighboring grains within an exchange volume. Chemical partitioning during devitrification creates variations in local composition compared to the nominal alloy composition. These variations impact material properties such as magnetostriction, Curie temperature, and grain size. Local composition measurements of annealed nanocomposites by Atom Probe Tomography link observed magnetic properties to the material structure. The impacts of chemical partitioning on diffusion limited grain growth, intergranular coupling at high temperature, and induced anisotropy are discussed.