Magnetic properties of antiferromagnetically coupled antidots of Co/Pd multilayers

S. N. Piramanayagam; M. Ranjbar; H. K. Tan; W. C. Allen Poh; R. Sbiaa; T. C. Chong

doi:10.1063/1.3678305

Magnetic properties of antiferromagnetically coupled antidots of Co/Pd multilayers

S. N. Piramanayagam^*, M. Ranjbar, H. K. Tan, W. C. Allen Poh, R. Sbiaa, T. C. Chong

^*Corresponding author for this work

Physics

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

4 Citations (Scopus)

Abstract

Antidots of Co/Pd multilayers with 3-bilayers [(Co/Pd) _x3] that were antiferromagnetically coupled(AFC) to (Co/Pd) _x10 were fabricated and their magnetic properties were investigated. The thickness of Co in (Co/Pd) _x3 was varied from 0.4 to 0.8 nm. Samples with a Co thickness of ₀.8 nm in the bilayer showed a perpendicular magnetic anisotropy (PMA) when antiferromagnetically coupled to (Co/Pd) _x10. On the other hand, the magnetization direction of single Co/Pd multilayers with thick Co (0.8 nm) as a reference structure (without AFC) was observed to be in plane, indicating that the PMA in (Co/Pd) _x3 films with thicker Co is due to the antiferromagnetic coupling. We also carried out a systematic study on this set of thin films patterned in antidot array fabricated using nanoimprint lithography. It was found that the AFC is helpful to induce a perpendicular magnetic anisotropy in both thin film and antidot form. Such a result is interesting both from a fundamental viewpoint and also from their potential applications in spintronics devices and patterned magnetic medium.

Original language	English
Article number	07B916
Journal	Journal of Applied Physics
Volume	111
Issue number	7
DOIs	https://doi.org/10.1063/1.3678305
Publication status	Published - Apr 1 2012

ASJC Scopus subject areas

Physics and Astronomy(all)

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@article{7af497ad94fa42b68ee32910a60a8e19,

title = "Magnetic properties of antiferromagnetically coupled antidots of Co/Pd multilayers",

abstract = "Antidots of Co/Pd multilayers with 3-bilayers [(Co/Pd) x3] that were antiferromagnetically coupled(AFC) to (Co/Pd) x10 were fabricated and their magnetic properties were investigated. The thickness of Co in (Co/Pd) x3 was varied from 0.4 to 0.8 nm. Samples with a Co thickness of 0.8 nm in the bilayer showed a perpendicular magnetic anisotropy (PMA) when antiferromagnetically coupled to (Co/Pd) x10. On the other hand, the magnetization direction of single Co/Pd multilayers with thick Co (0.8 nm) as a reference structure (without AFC) was observed to be in plane, indicating that the PMA in (Co/Pd) x3 films with thicker Co is due to the antiferromagnetic coupling. We also carried out a systematic study on this set of thin films patterned in antidot array fabricated using nanoimprint lithography. It was found that the AFC is helpful to induce a perpendicular magnetic anisotropy in both thin film and antidot form. Such a result is interesting both from a fundamental viewpoint and also from their potential applications in spintronics devices and patterned magnetic medium.",

author = "Piramanayagam, {S. N.} and M. Ranjbar and Tan, {H. K.} and {Allen Poh}, {W. C.} and R. Sbiaa and Chong, {T. C.}",

note = "Funding Information: M.R. would like to express gratitude for support from the A*STAR (SINGA) Graduate Scholarship program.",

year = "2012",

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doi = "10.1063/1.3678305",

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AU - Piramanayagam, S. N.

AU - Ranjbar, M.

AU - Tan, H. K.

AU - Allen Poh, W. C.

AU - Sbiaa, R.

AU - Chong, T. C.

N1 - Funding Information: M.R. would like to express gratitude for support from the A*STAR (SINGA) Graduate Scholarship program.

PY - 2012/4/1

Y1 - 2012/4/1

N2 - Antidots of Co/Pd multilayers with 3-bilayers [(Co/Pd) x3] that were antiferromagnetically coupled(AFC) to (Co/Pd) x10 were fabricated and their magnetic properties were investigated. The thickness of Co in (Co/Pd) x3 was varied from 0.4 to 0.8 nm. Samples with a Co thickness of 0.8 nm in the bilayer showed a perpendicular magnetic anisotropy (PMA) when antiferromagnetically coupled to (Co/Pd) x10. On the other hand, the magnetization direction of single Co/Pd multilayers with thick Co (0.8 nm) as a reference structure (without AFC) was observed to be in plane, indicating that the PMA in (Co/Pd) x3 films with thicker Co is due to the antiferromagnetic coupling. We also carried out a systematic study on this set of thin films patterned in antidot array fabricated using nanoimprint lithography. It was found that the AFC is helpful to induce a perpendicular magnetic anisotropy in both thin film and antidot form. Such a result is interesting both from a fundamental viewpoint and also from their potential applications in spintronics devices and patterned magnetic medium.

AB - Antidots of Co/Pd multilayers with 3-bilayers [(Co/Pd) x3] that were antiferromagnetically coupled(AFC) to (Co/Pd) x10 were fabricated and their magnetic properties were investigated. The thickness of Co in (Co/Pd) x3 was varied from 0.4 to 0.8 nm. Samples with a Co thickness of 0.8 nm in the bilayer showed a perpendicular magnetic anisotropy (PMA) when antiferromagnetically coupled to (Co/Pd) x10. On the other hand, the magnetization direction of single Co/Pd multilayers with thick Co (0.8 nm) as a reference structure (without AFC) was observed to be in plane, indicating that the PMA in (Co/Pd) x3 films with thicker Co is due to the antiferromagnetic coupling. We also carried out a systematic study on this set of thin films patterned in antidot array fabricated using nanoimprint lithography. It was found that the AFC is helpful to induce a perpendicular magnetic anisotropy in both thin film and antidot form. Such a result is interesting both from a fundamental viewpoint and also from their potential applications in spintronics devices and patterned magnetic medium.

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Magnetic properties of antiferromagnetically coupled antidots of Co/Pd multilayers

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