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In this paper, the authors studied the ferromagnetic resonance (FMR) linewidth of thin Fe films in NM/Fe/NM structures (NM[30 Aring]=Al, Cu, Ti and Ta) to investigate the relaxation mechanism. Polycrystalline Fe films, with thicknesses of 20 to 300 Aring in steps of 20 Aring were grown by sputtering on GaAs(100) substrates. The experimental results and their interpretation agreed with the microscopic...
In this article, the authors proposed an alternative method to improve the magnetoresistance (MR) by inserting a thin ferromagnetic (FM) layer in the nonmagnetic (NM) spacer of a basic spin valve (SV) trilayer structure (FM-NM-FM), thus creating a pentalayer structure. It is found that MR value can be doubled by inserting a FM layer with high intrinsic spin polarization, such as halfmetallic CrO2.
In this study, spin-transfer induced magnetization dynamics in exchange-biased spin-valves, for both polarities of current and field are studied. The structure of the samples included a synthetic pinned layer and a soft free layer, patterned into square pillars with a lateral size of the order of 100 nm. The resistance of the pillars was of the order of 5Omega, and the measured giant magnetoresistance...
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