Abstract
We reported the study of the C60-based organic spin valve device, consisting of a trilayer of La0.67Sr0.33 MnO3, an organic C60, and cobalt; and we also investigated the electronic properties of the C60 thin films using the top-contact C60-FETs. Then the spin relaxation time in C60 at room temperature was measured, and it was found to be exceptionally short—just only a few nanoseconds. Our experimental observations strongly suggest that the primary spin relaxation mechanism in the organic material C60 should be the Elliott–Yafet mechanism, in which the spin relaxes whenever a carrier scatters and its velocity changes.
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