Electrical Spin Injection in Multi-Wall carbon NanoTubes with transparent ferromagnetic contacts

Details Electrical Spin Injection in Multi-Wall carbon NanoTubes with transparent ferromagnetic contacts Electrical Spin Injection in Multi-Wall carbon NanoTubes with transparent ferromagnetic contacts

2004-11-24

arxiv.org/abs/cond-mat/0411623v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

submitted to APL version without figures version with figures available on http://www.unibas.ch/phys-meso/

Scientific paper

10.1063/1.1882761

We report on electrical spin injection measurements on MWNTs . We use a ferromagnetic alloy Pd$_{1-x}$Ni$_{x}$ with x $\approx$ 0.7 which allows to obtain devices with resistances as low as 5.6 $k\Omega$ at 300 $K$. The yield of device resistances below 100 $k\Omega$, at 300 $K$, is around 50%. We measure at 2 $K$ a hysteretic magneto-resistance due to the magnetization reversal of the ferromagnetic leads. The relative difference between the resistance in the antiparallel (AP) orientation and the parallel (P) orientation is about 2%.

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