Structural Modification of Magnetic Properties in Perpendicularly Magnetized Co/Pd Multilayer for M RAM

Budi Purnama


The structural modification of magnetic properties in as grown films of Co/Pd multilayer with perpendicular magnetic anisotropy (PMA) has been systematically studied. The thickness dependence of element multilayer for both the Co thickness tCo and the Pd thickness tPd as parameters was investigated. Occurred PMA should be correlated to between bi-layers and following the enhancement of interface interaction due to the increase of repetition number bi-layers. The optimal experimental result was obtained for Co = 1.7 Å and Pd = 8.0 Å realizing very good square shape hysteresis curve and high coercive field Hc of 1.5 kOe.


Multilayer; PMA; MRAM

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Carcia, P.F., Meinhaldt, A.D and Suna, A., 1985, Perpendicular Magnetic Anisotropy in Pd/Co Thin Film Layered Structures, Appl. Phys.Lett., 47 p.178.

Weller, D and McDaniel, T. , 2006, in Advanced Magnetic Nanostructures, edited by D. J. Sellmyer and R. Skomski, Springer, Berlin p.295.

Beech, R. S., Anderson, J. A., Pohm A. V., and Daughton, J. M., 2000, Curie Point Written Magnetoresistive Memory, J. Appl. Phys., 87 p.6403.

Prejbeanu, I. L., Kerekes, M., Sousa, R.C., Sibuet, H., Redon, O., Dieny B., and Nozières, J.P., 2007, Thermally Assisted MRAM, J. Phys.: Condens. Matter, 19 p.165218.

Hashimoto, S., Ochoai, Y., and Aso, K., 1989, Perpendicular Magnetic Anisotropy and Magnetostriction of Sputtered Co/Pd and Co/Pt Multilayered Films, J. Appl. Phys. 66, 4909-4916.

Kim, S. K., and Shin, S. C., 2001, Alloy-like Co Environment in Co/Pd Multilayer Films Having Perpendicular Magnetic Anisotropy, J. Appl. Phys. 89, 3055-3057.

Sawad, M., Hayashi, K., and Kakizaki, A., 2003, Perpendicular Magnetic Anisotropy of Co/Pd (111) Studied by Spin-Resolved Photoelectron Spectroscopy, J. Phys. Soc. Jpn. 72, 1161-1165.

Budi Purnama, Nozaki, Y., and Matsuyama, K., 2007, Micromagnetic Simulation of Thermally Assisted Magnetization Reversal in Magnetic Nanodot with Perpendicular Anisotropy, J. Magn. Mag. Mater., 310 p. 2683-2685.

Budi Purnama, Tanaka, T., Nozaki, N., and Matsuyama, K., 2009, Material Dependence of Thermally Assisted Magnetization Reversal Properties in Microstructured Co/Pd Multilayers, Appl. Phys. Express 2 p. 033001-033003.

Budi Purnama, Nozaki, Y., and Matsuyama, K., 2008. Structural Control of Magnetic Properties in Co/Pd Multilayer for Heat Assisted Perpendicular MRAM Application, Res. Rep. on ISEE of Kyushu University 13(2) p. 75-79.

Cullity, B.D., 1972. Introduction to Magnetic Materials, Addison-Wesley, Reading, MA p. 248.



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