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Title: Atomic ordering and magnetic properties of polycrystalline Ll o-FePd dot arrays
Authors: Kang, J.-G.
Ha, J.-G.
Koh, J.-H.
Koo, S.-M.
Kamiko, M.
Mitani, S.
Sakuraba, Y.
Takanashi, K.
Bae, S.-T. 
Yeom, H.-J.
Keywords: Atomic ordering
Dot array
FePd film
Llo-ordered polycrystalline
Issue Date: 2010
Citation: Kang, J.-G., Ha, J.-G., Koh, J.-H., Koo, S.-M., Kamiko, M., Mitani, S., Sakuraba, Y., Takanashi, K., Bae, S.-T., Yeom, H.-J. (2010). Atomic ordering and magnetic properties of polycrystalline Ll o-FePd dot arrays. Physica B: Condensed Matter 405 (15) : 3149-3153. ScholarBank@NUS Repository.
Abstract: The polycrystalline Ll0-FePd (001) films considering a highly ordered dot array with various sizes have been successfully prepared by using a microfabrication process. The lateral size of square dots was changed in between 1 and 10 μm. The coercivity (Hc) of patterned L1 0-ordered FePd films was found to be slightly reduced compared to that of continuous ilm. Furthermore, Hc was slightly decreased after annealing at 500 °C. In the pinning mechanism, Hc can be determined by strong pinning sites for domain walls, which are the grain boundary regions in L1 0-ordered polycrystalline FePd ilms. These results indicate that the dot size dependence of Hc before and after annealing may be related to the pinning mechanism. The long-range ordering parameter (S) was increased after annealing. This demonstrates that post-annealing accelerates L10-FePd ordering, but there is no clear correlation between S and Hc. © 2010 Elsevier B.V. All rights reserved.
Source Title: Physica B: Condensed Matter
ISSN: 09214526
DOI: 10.1016/j.physb.2010.04.036
Appears in Collections:Staff Publications

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