Heat Assisted Magnetization Reversal on Perpendicular Magnetized Nano-Dot

Nur Aji Wibowo, Cari Cari, Budi Purnama


Heat assisted magnetization reversal on perpendicular magnetized nano-dots has been studied by solved Landau Lifshift-Gilbert equation for magnetic recording application. The heat assisted magnetization reversal scheme has been proven to be effectively reduces threshold field down to 90 %. Otherwise, this field doesn’t depend on heating time. To understand a read-write information process, cooling time dependence of threshold field has been evaluated. As a result, the threshold field depends on the cooling time and become constant after 300 ps. This result corresponds to data transfer of Hard Disc Drive about 30 Gb/s.


magnetic recording; PMA; heat assisted; threshold field; heating time and cooling time

Full Text:



Koji Matsumoto, Akhihiro Inomata, and Shin-ya Hasigawa, “Thermally assisted magnetic revording”, FUJITSU Sci. Tech. J.,Vol. 42, pp. 158. 2006.

Ralph Skomski, “Role of thermodynamic fluctuation in magnetic recording”, Journal of Applied Physics, Vol. 101. No. 09B104,2007.

Keita Waseda, Ryosuke Doi, Budi Purnama, Satoru Yoshimura, Yukio Nozaki and Kimihide Matsuyama, “Heat-assisted magnetization reversal using pulsed laser irradiation in patterned magnetic thin film with perpendicular anisotropy”, IEEE Transactions on Magnetics, Vol . 44, No.11, pp. 2483-2486, 2008.

R.C. Sousa, C. Prejbeanu, “Non-volatile Magnetic Random Access Memories (MRAM)”, C.R. Physique, Vol. 6. No. 9, pp. 1013-1021, 2005.

Purnama, Budi, ”Thermally assisted agnetization reversal in perpendicularly magnetized thin film”, Doctoral Thesis, Electronics Department Graduated School of Information Science and Eectrical Engineering, Kyushu University, Japan, 2009.

T. Schrelf, J. Fidler, D. Suess, W. Scholz, and V. Tsiantos, “Handbook of magnetic materials: micro magnetic simulation of dynamic and thermal effects”, Tsinghua University Press, 2006, pp.129-130.

K.J. Lee and T.D. Lee, “Effect of the thermal fluctuation on switching field of deep submicron sized soft magnetic thin film”, Journal of Applied Physics, Vol. 91, No. 10, pp. 7706-7708, 2002.

Y. Nosaki, Y. Isowaki, A. Hashimoto, B. Purnama and K. Matsuyama, “Numerical analysis of thermally assisted.

DOI: http://dx.doi.org/10.12962/j20882033.v22i2.64


  • There are currently no refbacks.

Creative Commons License

IPTEK Journal of Science and Technology by Lembaga Penelitian dan Pengabdian kepada Masyarakat, ITS is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
Based on a work at http://iptek.its.ac.id/index.php/jts.