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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 634-638Strong Perpendicular Magnetic Anisotropy with High...

Strong Perpendicular Magnetic Anisotropy with High Thermal Stability in Annealed Co/Native Oxide/Pd Multilayers

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Abstract:

A novel perpendicular magnetic material was obtained in the annealed Co/native oxide/Pd multilayer films. Upon thermal annealing in a vacuum, a sharp transition of magnetic anisotropy from in-plane to out-of-plane is observed for the Co/native oxide/Pd multilayers with 20 Å Co layers. These annealed Co/native oxide/Pd multilayers possess extremely large effect perpendicular anisotropy field (H_eff) and perpendicular anisotropy energy (K_u), with the maximum H_eff of 17 kOe and K_u of 5.1×10⁶ erg/cm³ obtained in the annealed Co(20 Å)/native oxide/Pd(10 Å) multilayers. Moreover, the large perpendicular magnetic anisotropy sustains with annealing temperature varying from 200°C to 400°C, indicative of high thermal stability. The present results open the way to a third alternative for the realization of thermally stable perpendicular magnetic electrodes of tunnel junctions.

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Advanced Materials Research (Volumes 634-638)

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2506-2511

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.634-638.2506

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Online since:

January 2013

Authors:

Qin Li Lv, Jian Wang Cai, Tao Li

Keywords:

Effect Perpendicular Anisotropy Field, Magnetic Tunnel Junction, Perpendicular Anisotropy Energy, Perpendicular Magnetic Anisotropy, Thermal Stability

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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