Evaluation of exchange stiffness constant in iron garnet film using micromagnetic simulation
Abstract
Measurement of exchange stiffness constants (ESCs) is crucial for describing magnetization phenomena. Large-scale micromagnetic simulations (MMSs) are used to determine the ESC of iron garnet thin films exhibiting perpendicular magnetic anisotropy. The ESC determined by fitting the calculated domain periodicity with experimental data acquired through a polarized microscope is comparable to previously reported values. In addition, the simulations showed mixed-configuration domain wall (DW) structure with a large Néel–Bloch DW ratio. This study demonstrates the capability of MMS for evaluating ESCs while providing additional insights into DW physics, offering a facile approach for describing spin dynamics in magnetic garnets.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (8)
Takumi Koguchi
Research Institute of Electrical Communication, Tohoku University 1 , 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577,
Toshiaki Watanabe
Hibiki Miyashita
Research Institute of Electrical Communication, Tohoku University 1 , 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577,
Kazushi Ishiyama
Research Institute of Electrical Communication, Tohoku University 1 , 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577,
Yuichi Nakamura
Toyohashi University of Technology 3 , 1-1 Hibarigaoka, Tempaku, Toyohashi, Aichi 441-8580,
Mitsuteru Inoue
Research Institute of Electrical Communication, Tohoku University 1 , 2-1-1 Katahira, Aoba, Sendai, Miyagi 980-8577,
Mehmet C. Onbasli
Electrical and Electronics Engineering and Physics, Koç University 5 , Rumelifeneri Yolu 34450, Sariyer, Istanbul,
Taichi Goto