Study of the reduced magnetic field required for thermally assisted magnetization reversal

8th International Conference on Physics and its Applications

Firdausi, H.F.Y.^1 ; Utari^1 ; Purnama, B.^1

Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami 36A, Kentingan Surakarta

57126, Indonesia^1

关键词: Anisotropy constants;    Antiferromagnetics;    Field directions;    Initial conditions;    Magnetic dots;    Micromagnetic simulations;    Single-domain configuration;    Stochastic effects;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/776/1/012028/pdf
DOI  :  10.1088/1742-6596/776/1/012028

来源: IOP

【 摘 要 】

The reduced magnetic field required for thermally magnetization reversal discussed in this paper. Study of thermally assisted magnetization reversal conduct by using micromagnetic simulation. The magnetic dot size of the simulation was 50 nm × 50 nm × 20 nm. The perpendicularly anisotropy constant was 2 × 106 erg/cm3. Initial condition was set single domain configuration. Then a sufficiently thermal pulse was used to get stochastic effect so that the magnetization along to the induce field direction for pico second duration. The results show that the reduced magnetic field mechanism seem to be temporary antiferromagnetic configuration before single domain configuration in alinging along to field direction. The same mechanims observed for modify of thickness dot particles. The require magnetic field of 145 Oe in thermally assisted magnetization reversal open a posibility for MRAM application.