Micromagnetic Simulation of Size Effects on the Properties of Ferromagnetic Materials


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Micromagnetic simulation was carried out to investigate the behavior of ferromagnetic materials at a very small length scale, at which the materials usually exhibit different properties compared with those of the corresponding bulk materials. By solving the time and spatial dependent Landau-Lifshitz-Gilbert (LLG) equation in reciprocal space using fast Fourier transformation (FFT) technique, the equilibrium magnetization state was, thus, achieved. The hysteresis loops were also simulated, from which the relation of coercivity and characteristic length was established. Besides, the effect of external stress on coercivity was also taken into consideration. The results showed that at such length scales the external stress strongly affected the magnetic behavior of ferromagnetic materials.



Key Engineering Materials (Volumes 334-335)

Edited by:

J.K. Kim, D.Z. Wo, L.M. Zhou, H.T. Huang, K.T. Lau and M. Wang




R. L. Hu and A. K. Soh, "Micromagnetic Simulation of Size Effects on the Properties of Ferromagnetic Materials", Key Engineering Materials, Vols. 334-335, pp. 1125-1128, 2007

Online since:

March 2007




[1] S.G. Grancharov, H. Zeng, S.H. Sun, S.X. Wang, S. O'Brien, C.B. Murray, J.R. Kirtley and G.A. Held: J. Phys. Chem. B 109 (2005), p.13030.

[2] E. Arzt: Acta. Mater. 46 (1998), p.5611.

[3] E.F. Kneller and F.E. Luborsky: J. Appl. Phys. 34 (1963), p.656.

[4] W.F. Jr. Brown: Phys. Rev. 130 (1963), p.1677.

[5] G. Herzer: IEEE Transactions on Magnetics 26 (1990), p.1397.

[6] R. Alben, J.J. Becker and M.C. Chi: J. Appl. Phys. 49 (1978), p.1653.

[7] T. Schrefl, J. Fiedler and H. Kronmuller: Phys. Rev. B 49 (1994), p.6100.

[8] R. Fischer, T. Schrefl, H. Kronmuller and J. Fidler: J. Magn. Magn. Mater. 153 (1996), p.35.

[9] D. Weller et al.: IEEE Trans. Magn., 32 (2000), p.10.