Fabrication of MgO barrier for a magnetic tunnel junction in as-deposited state using amorphous RE–TM alloy

Ohmori, Hideto; Hatori, T.; Nakagawa, Shigeki

doi:10.1016/j.jmmm.2008.08.005

Cited by 6 publications

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References 5 publications

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“…During the last decades, thin films of soft magnetic alloys such as NiFe and FeCo have been in focus due to possible use in applications such as spin valves, 1,2 magnetic tunneling junctions, 3,4,5 spin injectors, 6 magnetic storage technologies and in particular in magnetic recording write heads. 7 Besides spintronic and magnetic memory devices, such materials are useful for shielding applications that are necessary in order to reduce the effect of electromagnetic fields created by electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Gilbert damping in Re-doped FeCo films: Combined experimental and theoretical study

et al. 2019

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The effects of rhenium doping in the range 0 -10 at% on the static and dynamic magnetic properties of Fe65Co35 thin films have been studied experimentally as well as with first principles electronic structure calculations focussing on the change of the saturation magnetization ( ) and the Gilbert damping parameter ( ) Both experimental and theoretical results show that decreases with increasing Re doping level, while at the same time increases. The experimental low temperature saturation magnetic induction exhibits a 29% decrease, from 2.31T to 1.64T, in the investigated doping concentration range, which is more than predicted by the theoretical calculations. The room temperature value of the damping parameter obtained from ferromagnetic resonance measurements, correcting for extrinsic contributions to the damping, is for the undoped sample 2.7 × 10 −3 , which is close to the theoretically calculated Gilbert damping parameter. With 10 at% Re doping, the damping parameter increases to 9.0 × 10 −3 , which is in good agreement with the theoretical value of 7.3 × 10 −3 . The increase in damping parameter with Re doping is explained by the increase in density of states at Fermi level, mostly contributed by the spin-up channel of Re. Moreover, both experimental and theoretical values for the damping parameter are observed to be weakly decreasing with decreasing temperature.

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