Limit Efek Stochastik untuk Thermally Assisted Magnetization Reversal

Hanin Firdausi, U Utari, Budi Purnama

Abstract


Evaluasi limit stochastik untuk thermally assisted magnetization reversal (TAMR) dibahas pada paper ini. Simulasi ini dilakukan dengan menyelesaikan persamaan Landau-Liftshitz-Gilbert (LLG) dengan asumsi nanopartikel CoPtCr magnetik dengan anisotropi tegaklurus sebagai storage cell memory. Magnetisasi mulai searah dengan medan eksternal sebesar H = 2,0 kOe, saat temperatur penulisan sebesar TW = 95,2%TC dan meningkat terus hingga hingga 85% saat TW = 97,86%TC. Sehingga keadaan ini (TW = 97.86%TC) dianggap sebagai batas limit stochastik untuk TAMR pada penelitian ini. Akhirnya, peningkatan temperatur penulisan 99,97%TC hanya menaikkan prosentase MX searah medan eksternal H sebesar 10%.


Abstract


Evaluation of stochastic limit for thermally assisted magnetization reversal (TAMR) discussed in this paper. This simulation is done by solving the equation Landau-Liftshitz-Gilbert (LLG) assuming nanoparticles CoPtCr
perpendicular magnetic anisotropy as a memory cell storage. The magnetization direction aligning along to the external field direction of H = 2.0 kOe started when the writing temperature TW is 95.2%TC and increased steadily up to 85% when TW = 97.86% of TC. So that this condition (TW = 97.86% of TC) is regarded as the limit of stochastic for TAMR in this study. Finally, the writing temperature increase of 99.97%TC only raise thepercentage of MX in the direction of the external field H by 10%.


Keywords


TAMR, anisotropi tegaklurus, stochastic, temperatur penulisan

Full Text:

PDF PDF

References


K. Matsumoto, A. Inomata, and S. Hasegawa, Fujitsu Sci. Tech. J., 42(1), 158-167, (2006).

K.Waseda, et al., IEEE Transaction on Magnetics, 44(11), 2483-2486 (2008).

Y. Nozaki, et al., Journal of the Magnetics Society of Japan, 30(6-2), 574-577 (2006).

B. Purnama, et al., Journal of Magnetism and Magnetic Materials, 321, 1325-1330 (2009).

W. Sadnawanto, and Budi Purnama, Journal of Physics: Conference Series, 539, 012024 (2014).

D. Suess, et al., Journal of Applied Physics, 117, 163913 (2015).

R.C. Sousa, I.L. Prejbeanu, Preprint submitted to Elsevier Science, (2005).

A. Thiaville, et al., Europhysics . Lett., 69(6), 990-996 (2005) .

Ismail, Studi Mikromagnetik Proses Magnetisasi dan Spektrum Suseptibilitas Ferromagnetik Elemen Diamod-Shaped, Thesis, Universitas Indonesia, Depok, 2013.

T.L. Gilbert, IEEE Transaction on Magnetic, 40(6), 3443-3449 (2004).

G. Binasch, et al., The American Physical Society, 39(7), (1989).




DOI: http://dx.doi.org/10.12962/j24604682.v12i2.1337

Refbacks

  • There are currently no refbacks.


Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.