Tuning the interlayer exchange coupling between single perpendicularly magnetized CoFeB layers

R. Lavrijsen; A. Fernandez-Pacheco; D. Petit; R. Mansell; J. H. Lee; R. P. Cowburn

doi:10.1063/1.3682103

Tuning the interlayer exchange coupling between single perpendicularly magnetized CoFeB layers

R. Lavrijsen, A. Fernandez-Pacheco, D. Petit, R. Mansell, J. H. Lee, R. P. Cowburn

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Abstract

We experimentally study the tunability of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interlayer exchange coupling (IEC) in Pt/CoFeB/Pt/Ru/Pt/CoFeB/Pt stacks with perpendicular magnetic anisotropy (PMA). The perpendicular magnetization of a single Pt/Co60Fe20B20/Pt (at. %) shows full remanence and square hysteresis loops for a CoFeB thickness range of 0.60–1.0 nm. By inserting a Pt layer between the Ru and CoFeB, the PMA of the ultrathin CoFeB layers is stabilized and the IEC can be tuned. In particular, we show that the IEC versus Pt thickness exhibits a simple exponential decay with a decay length of 0.16 nm.

Original language	English
Article number	052411
Pages (from-to)	1-6
Journal	Applied Physics Letters
Volume	100
Issue number	5
DOIs	https://doi.org/10.1063/1.3682103
Publication status	Published - 30 Jan 2012

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abstract = "We experimentally study the tunability of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interlayer exchange coupling (IEC) in Pt/CoFeB/Pt/Ru/Pt/CoFeB/Pt stacks with perpendicular magnetic anisotropy (PMA). The perpendicular magnetization of a single Pt/Co60Fe20B20/Pt (at. %) shows full remanence and square hysteresis loops for a CoFeB thickness range of 0.60–1.0 nm. By inserting a Pt layer between the Ru and CoFeB, the PMA of the ultrathin CoFeB layers is stabilized and the IEC can be tuned. In particular, we show that the IEC versus Pt thickness exhibits a simple exponential decay with a decay length of 0.16 nm.",

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T1 - Tuning the interlayer exchange coupling between single perpendicularly magnetized CoFeB layers

AU - Lavrijsen, R.

AU - Fernandez-Pacheco, A.

AU - Petit, D.

AU - Mansell, R.

AU - Lee, J. H.

AU - Cowburn, R. P.

PY - 2012/1/30

Y1 - 2012/1/30

N2 - We experimentally study the tunability of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interlayer exchange coupling (IEC) in Pt/CoFeB/Pt/Ru/Pt/CoFeB/Pt stacks with perpendicular magnetic anisotropy (PMA). The perpendicular magnetization of a single Pt/Co60Fe20B20/Pt (at. %) shows full remanence and square hysteresis loops for a CoFeB thickness range of 0.60–1.0 nm. By inserting a Pt layer between the Ru and CoFeB, the PMA of the ultrathin CoFeB layers is stabilized and the IEC can be tuned. In particular, we show that the IEC versus Pt thickness exhibits a simple exponential decay with a decay length of 0.16 nm.

AB - We experimentally study the tunability of the Ruderman-Kittel-Kasuya-Yosida (RKKY) interlayer exchange coupling (IEC) in Pt/CoFeB/Pt/Ru/Pt/CoFeB/Pt stacks with perpendicular magnetic anisotropy (PMA). The perpendicular magnetization of a single Pt/Co60Fe20B20/Pt (at. %) shows full remanence and square hysteresis loops for a CoFeB thickness range of 0.60–1.0 nm. By inserting a Pt layer between the Ru and CoFeB, the PMA of the ultrathin CoFeB layers is stabilized and the IEC can be tuned. In particular, we show that the IEC versus Pt thickness exhibits a simple exponential decay with a decay length of 0.16 nm.

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DO - 10.1063/1.3682103

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JO - Applied Physics Letters

JF - Applied Physics Letters

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Tuning the interlayer exchange coupling between single perpendicularly magnetized CoFeB layers

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