MuMax3 Simulation of Micromagnetic Arrays
My work with the Takamura Research GroupThe Project
The TRG works with LSMO thin film systems that exhibit unique Structural and Magnetic Properties. The cutting edge of research in magnetic materials currently is the topic of Complex Spin Textures (CSTs). Thus, several questions arise on the topic of CSTs in relation to LSMO thin film systems: How can we quantify the energetic description of CSTs in a LSMO thin film? How do these micromagnetic spin textures affect the macro level Structural and Magnetic Properties of a material? Through a combination of Computation simulation and experimental PEEM measurments, we can discover how these correlate.
Experimental Methodology
Using MuMax3 in combination with PEEM Measurements, we can compute the frequency of various degenerate energy configurations into four types of degenerate energy configurations. These energy configurations have different values of entropy based on the flux closure of the material. Type 1 configurations have the lowest entropy with 2 moments point into the middle and 2 point out. Type 4 configurations have the highest configuration entropy with all arrows pointing in or out. Using these 4 degenerate energy configurations along with LSMO magnetic parameters, my job is to extend the energy analysis to “square ice systems” where 4 magentic moments come together.
Results So Far
Previous results for the “Kagome” system showed considerable agreement between the MuMax3 software and PEEM measurements. I am currently analyzing the system shown on the left for all 2^6 possible magnetic configurations while eliminating degenerate energy configurations in order to see which of the 64 configurations is energetically and magnetically equivalent. Seen to the left is one of 64 configurations possible for a “Square Ice” system.