Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB

Wiese N, Dimopoulos T, Ruehrig M, Wecker J, Reiss G, Sort J, Nogues J (2007)
EPL 78(6).

Journal Article | Published | English

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Abstract
The temperature dependence of saturation and spin-flop fields for artificial ferrimagnets (AFi) based on antiparallel coupled CoFeB/Ru/CoFeB trilayers has been investigated in a temperature range between 80 K and 600 K. The results presented in this paper are relevant for magnetic devices using this system, e.g. magnetic-random access memory based on spin-flop switching. In good accordance to the theory, the saturation field H-sat, behaves like H-sat proportional to H-0 (T/T-0)/sinh(T/T-0) with a characteristic temperature of T-0 approximate to 150 K. Within this model, the Fermi velocity for the Ru laver is of the order of 10(5) m/s, therefore, explaining the strong variation of the coupling strength with the temperature in Ru-based AFi. Furthermore, a strong uniaxial anisotropy of K-u = 2 x 10(3) J/m(3) with a small angular distribution of the anisotropy axes is observed for the AFi trilayers based on amorphous CoFeB alloys. Copyright (C) EPLA, 2007
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Wiese N, Dimopoulos T, Ruehrig M, et al. Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB. EPL. 2007;78(6).
Wiese, N., Dimopoulos, T., Ruehrig, M., Wecker, J., Reiss, G., Sort, J., & Nogues, J. (2007). Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB. EPL, 78(6).
Wiese, N., Dimopoulos, T., Ruehrig, M., Wecker, J., Reiss, G., Sort, J., and Nogues, J. (2007). Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB. EPL 78.
Wiese, N., et al., 2007. Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB. EPL, 78(6).
N. Wiese, et al., “Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB”, EPL, vol. 78, 2007.
Wiese, N., Dimopoulos, T., Ruehrig, M., Wecker, J., Reiss, G., Sort, J., Nogues, J.: Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB. EPL. 78, (2007).
Wiese, N., Dimopoulos, T., Ruehrig, M., Wecker, J., Reiss, Günter, Sort, J., and Nogues, J. “Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB”. EPL 78.6 (2007).
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