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- W2962892938 abstract "The impact of in-plane alternating currents on the exchange bias, resistance, and magnetoresistance of a ${mathrm{Co}}_{85}{mathrm{Fe}}_{15}∕{mathrm{Ni}}_{0.85}{mathrm{Co}}_{0.15}mathrm{O}∕{mathrm{Co}}_{85}{mathrm{Fe}}_{15}∕mathrm{Cu}∕{mathrm{Co}}_{85}{mathrm{Fe}}_{15}$ spin valve is studied. With increasing current, the resistance is increased while the maximum magnetoresistance ratio decreases. Noticeably, the reversal field of the pinned layer is systematically suppressed in both field sweeping directions. Since ${mathrm{Ni}}_{0.85}{mathrm{Co}}_{0.15}mathrm{O}$ is a good insulator, it is expected that the ac flows only in the ${mathrm{Co}}_{85}{mathrm{Fe}}_{15}∕mathrm{Cu}∕{mathrm{Co}}_{85}{mathrm{Fe}}_{15}$ top layers, thus ruling out any presence of spin-transfer torque acting on the spins in the antiferromagnetic layer. Instead, our measurements show clear evidence of the influence of Joule heating caused by the current. Moreover, results from temperature-dependent measurements very much resemble those of the current dependence, which indicates that the effect of Joule heating plays a major role in the current-in-plane spin-valve configurations. The results also suggest that spin-transfer torques between ferromagnetic layers might still exist and compete with the exchange bias at sufficiently high currents." @default.
- W2962892938 created "2019-07-30" @default.
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- W2962892938 date "2008-04-16" @default.
- W2962892938 modified "2023-09-25" @default.
- W2962892938 title "Impact of in-plane currents on magnetoresistance properties of an exchange-biased spin valve with an insulating antiferromagnetic layer" @default.
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- W2962892938 doi "https://doi.org/10.1103/physrevb.77.132406" @default.
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