Ferromagnetic resonance measurements of (Co/Ni/Co/Pt) multilayers with perpendicular magnetic anisotropy

Published

August 20, 2016

Author(s)

R R Sbiaa, Justin Shaw, Hans Nembach, M Al Bahri, M Ranjbar, J. ?kerman, S. N. Piramanayagam

Abstract

Multilayers of [Co/Ni(t)/Co/Pt]×8 with varying Ni thickness were investigated for possible use as a free layer in magnetic tunnel junctions and spintronics devices. The thickness t of the Ni sub-layer was varied from 0.3 nm to 0.9 nm and the resulting magnetic properties were compared with (Co/Ni) and (Co/Pt) multilayers. As determined from magnetic force microscopy, magnetometry and ferromagnetic resonance measurements, all multilayers exhibited perpendicular magnetic anisotropy. Compared with (Co/Pt) multilayers, the sample with t of 0.9 nm showed almost the same anisotropy field of μ0Hk = 1.15 T but the damping constant was 40% lower. These characteristics make these multilayers attractive for spin torque based magnetoresistive devices with perpendicular anisotropy.

Citation

Journal of Physics D-Applied Physics

Volume

49

Pub Type

Journals

Download Paper

https://doi.org/10.1088/0022-3727/49/42/425002

Local Download

Keywords

Ferromagnetic resonance, perpendicular anisotropy, magnetic damping, magnetic force microscopy, magnetic tunnel junctions

Citation

R Sbiaa, R. , Shaw, J. , Nembach, H. , Al Bahri, M. , Ranjbar, M. , ?kerman, J. and Piramanayagam, S. (2016), Ferromagnetic resonance measurements of (Co/Ni/Co/Pt) multilayers with perpendicular magnetic anisotropy, Journal of Physics D-Applied Physics, [online], https://doi.org/10.1088/0022-3727/49/42/425002, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=921059 (Accessed October 27, 2025)