The Size and Temperature Effects of Coercivity for the Magnetic Nanowire: Monte Carlo Simulation

Abstract:

Based on Monte Carlo simulation we study the coercivity of iron nanowire deposited in chemically widened anodic aluminum oxide films. The coercivity is found to depend on the diameter and aspect ratio of the nanowire, and it decreases with increasing nanowire diameter, which is consistent with the experimental result. Two kinds of discretization cells regular global-shaped and regular cubic-shaped are used as minimum element. The simulation result reveals that the regular global-shaped discretization cell allows for more accurate calculated result while comparing to the experimental result than the cubic-shaped discretization cell does. The simulated coercivity as a function of temperature with different diameters shows that the data can be described well by the T-c power-law, and the diameter dependence of the exponent c displays a maximum peak.

• Periodical: Solid State Phenomena (Volumes 121-123)
• Pages: 1081-1084
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.121-123.1081
• Online since: March 2007
• Authors: Ke Hua Zhong, Zhi Cheng Zhang, Bao Hua Shen, Mei Mei Lin, Qian Feng, Zhi Gao Huang
• Keywords: Coercivity, Monte-Carlo, Nanowire

References

[1] A. Fert and L. Piraux: J. Magn. Magn. Mater. Vol. 200 (1999), p.338.

[2] P.M. Paulus et al.: J. Magn. Magn. Mater. Vol. 224 (2001), p.180.

[3] X.Y. Zhang, G.H. Wang, Y.F. Chan et al.: Appl. Phys. Lett. Vol. 83 (2003), p.3341.

[4] C. Seberino and H. Bertram: J. Appl. Phys. Vol. 85 (1999), p.5543.

[5] R. Ferre, K. Ounadjela, J. George, L. Piraux and S. Dubois: Phys. Rev. B Vol. 56 (1997), p.14066.

[6] D. Hinzke and U. Nowak: J. Magn. Magn. Mater. Vol. 221 (2000), p.365.

[7] Riccardo Hertel: J. Appl. Phys. Vol. 90 (2001), p.5752.

[8] D. AlMawlawi, N. Coombs and M. Moskvits: J. Appl. Phys. Vol. 70 (1991), p.4421.

[9] K. Binder, et al.: Monte Carlo Simulation in Statistical Physics (Springer, Berlin 1992).

[10] Zhigao Huang, Zhigao Chen, Kun Peng, et. al: Phys. Rev. B Vol. 69 (2004), p.094420.

[11] Zhigao Huang et al.: Eur. Phys. J. B Vol. 37 (2004), p.177.

[12] D.J. Sellmyer, M. Zheng and R. Skomski: J. Phys.: Condens. Matter. Vol. 13 (2001), p. R433.

[13] H. Zeng et al.: Phys. Rev. B Vol. 65 (2002), p.134426.

[14] S. Wirth et al.: Phys. Rev. B Vol. 57 (1998), p. R14028.

[15] N. Grobert, et al.: Appl. Phys. Lett. Vol. 75 (1999), p.3363.

[16] B.K. Chakrabarti and M. Acharyya: Rev. Mod. Phys. Vol. 71 (1998), p.847.

[17] Zhigao Huang et al.: Eur. Phys. J. B Vol. 38 (2005) (in press).