This article reports an investigation of the domain structure of cube-shaped BaFe12O19 models in zero magnetic field using the public-domain OOMMF micromagnetic simulator to model cubes with sides varying from 100 to 900 nm. A Bloch wall appears in BaFe12O19 cubes larger than about 510 nm and a single-domain structure appeared below 510 nm. The transition from single- to multiple- domain structure in the cube-shaped models occurred near the size predicted by analytical solutions of Kittel's equation. Analysis of the magnetization energy showed that the exchange energy increased with increasing size once the Bloch wall was formed. We also calculated the width of the Bloch walls from the full width at half maximum of the transverse component of the magnetization vector. The domain wall width increased, as the modeled cubes grew larger.
|Journal||IOP Conference Series: Materials Science and Engineering|
|Publication status||Published - 22 Feb 2019|
|Event||2nd International Conference on Current Progress in Functional Materials 2017, ISCPFM 2017 - Bali, Indonesia|
Duration: 8 Nov 2017 → 9 Nov 2017