Spin polarized transport over long carbon nanotubes (CNTs) is observed in magnetically assembled spin valves with electrochemically deposited ferromagnetic (FM) electrodes. An annealing procedure is developed to produce stable devices with highly transmissive FM/CNT contacts. The devices exhibit magnetoresistance (MR) with magnitudes up to 4%, and the sign of MR is consistently negative. The temperature dependence is investigated and MR is observed up to . Bias dependence is also investigated, with MR persisting up to .
Spin-polarized transport in magnetically assembled carbon nanotube spin valves
R. Thamankar, S. Niyogi, B. Y. Yoo, Y. W. Rheem, N. V. Myung, R. C. Haddon, R. K. Kawakami; Spin-polarized transport in magnetically assembled carbon nanotube spin valves. Appl. Phys. Lett. 17 July 2006; 89 (3): 033119. https://doi.org/10.1063/1.2221910
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