Effect of different seed layers on magnetic and transport properties of perpendicular anisotropic spin valves

Taiebeh Tahmasebi; S. N. Piramanayagam; Rachid Sbiaa; Randall Law; Tow Chong Chong

doi:10.1109/TMAG.2010.2041905

Effect of different seed layers on magnetic and transport properties of perpendicular anisotropic spin valves

Taiebeh Tahmasebi, S. N. Piramanayagam, Rachid Sbiaa^*, Randall Law, Tow Chong Chong

^*Corresponding author for this work

Physics

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

The effect of Ta, Cr and Cr₉₀Ru₁₀ seed layers on the magnetoelectronic properties of Co/Pd multilayers based pseudo-spin-valves (PSV) with perpendicular magnetic anisotropy (PMA) was investigated. Giant magnetoresistance curves of the PSV show the degradation of PMA with thicker Cr and CrRu seed layers, but no degradation was observed for Ta up to 50 Å. It appears that after the deposition of an intial amorphous wetting layer up to 20 Å, Cr and CrRu seed layers start to form three-dimensional clusters that do not favor the fcc (111) orientation of the Pd seed layer and Co/Pd multilayers. This resulted in a significant reduction of the PMA for thicker Cr and CrRu seed layers, such that well-separated switching of the magnetic layers cannot be achieved.

Original language	English
Article number	5467642
Pages (from-to)	1933-1936
Number of pages	4
Journal	IEEE Transactions on Magnetics
Volume	46
Issue number	6
DOIs	https://doi.org/10.1109/TMAG.2010.2041905
Publication status	Published - Jun 2010

Keywords

Crystallography
Giant magnetoresistance
Perpendicular magnetic anisotropy

ASJC Scopus subject areas

Electrical and Electronic Engineering
Electronic, Optical and Magnetic Materials

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abstract = "The effect of Ta, Cr and Cr90Ru10 seed layers on the magnetoelectronic properties of Co/Pd multilayers based pseudo-spin-valves (PSV) with perpendicular magnetic anisotropy (PMA) was investigated. Giant magnetoresistance curves of the PSV show the degradation of PMA with thicker Cr and CrRu seed layers, but no degradation was observed for Ta up to 50 {\AA}. It appears that after the deposition of an intial amorphous wetting layer up to 20 {\AA}, Cr and CrRu seed layers start to form three-dimensional clusters that do not favor the fcc (111) orientation of the Pd seed layer and Co/Pd multilayers. This resulted in a significant reduction of the PMA for thicker Cr and CrRu seed layers, such that well-separated switching of the magnetic layers cannot be achieved.",

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AU - Law, Randall

AU - Chong, Tow Chong

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N2 - The effect of Ta, Cr and Cr90Ru10 seed layers on the magnetoelectronic properties of Co/Pd multilayers based pseudo-spin-valves (PSV) with perpendicular magnetic anisotropy (PMA) was investigated. Giant magnetoresistance curves of the PSV show the degradation of PMA with thicker Cr and CrRu seed layers, but no degradation was observed for Ta up to 50 Å. It appears that after the deposition of an intial amorphous wetting layer up to 20 Å, Cr and CrRu seed layers start to form three-dimensional clusters that do not favor the fcc (111) orientation of the Pd seed layer and Co/Pd multilayers. This resulted in a significant reduction of the PMA for thicker Cr and CrRu seed layers, such that well-separated switching of the magnetic layers cannot be achieved.

AB - The effect of Ta, Cr and Cr90Ru10 seed layers on the magnetoelectronic properties of Co/Pd multilayers based pseudo-spin-valves (PSV) with perpendicular magnetic anisotropy (PMA) was investigated. Giant magnetoresistance curves of the PSV show the degradation of PMA with thicker Cr and CrRu seed layers, but no degradation was observed for Ta up to 50 Å. It appears that after the deposition of an intial amorphous wetting layer up to 20 Å, Cr and CrRu seed layers start to form three-dimensional clusters that do not favor the fcc (111) orientation of the Pd seed layer and Co/Pd multilayers. This resulted in a significant reduction of the PMA for thicker Cr and CrRu seed layers, such that well-separated switching of the magnetic layers cannot be achieved.

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