Causal analysis and visualization of magnetization reversal using feature extended landau free energy.

ABSTRACT: The magnetization reversal in nanomagnets is causally analyzed using an extended Landau free-energy model. This model draws an energy landscape in the information space using physics-based features. Thus, the origin of the magnetic effect in macroscopic pinning phenomena can be identified. The microscopic magnetic domain beyond the hierarchy can be explained using energy gradient analysis and its decomposition. Structural features from the magnetic domains are extracted using persistent homology. Extended energy is visualized using ridge regression, principal component analysis, and Hadamard products. We found that the demagnetization energy concentration near a defect causes the demagnetization effect, which quantitatively dominates the pinning phenomenon. The exchange energy inhibits pin

SUBMITTER: Kunii S 

PROVIDER: S-EPMC9709087 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature