Materials dependence of the spin-momentum transfer efficiency and critical current in ferromagnetic metal/Cu multilayers

Published

July 14, 2003

Author(s)

Matthew Pufall, William Rippard, Thomas J. Silva

Abstract

We have quantitatively compared spin momentum transfer effects in FM/Cu multilayers, with FM = Co, Co₉₀Fe₁₀, Ni₈₀Fe₂₀, Ni₄₀Fe₁₀Cu₅₀, and Fe. All of the measured multilayers exhibited an abrupt step in the resistance at a critical current I_c, the value of which was a linear function of applied magnetic field Happ. The spin-transfer efficiencies determined from these data were in reasonable agreement with their predicted values over the range of materials studied. I_c(H_app), when evaluated at zero net field, was found to increase with the exchange energy density of the ferromagnet, demonstrating the tunability of the critical current by materials selection.

Citation

Applied Physics Letters

Volume

83

Issue

2

Pub Type

Journals

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Keywords

Magnetics, Magnetodynamics, Spin-momentum transfer

Citation

Pufall, M. , Rippard, W. and Silva, T. (2003), Materials dependence of the spin-momentum transfer efficiency and critical current in ferromagnetic metal/Cu multilayers, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31293 (Accessed November 21, 2024)