In the last decades, spin-based devices have been developed in the effort for achieving faster memories, with low power consumption. To realize high working frequencies, which are required for current operating electronics, noise reduction is critical. We show that chiral molecule monolayer linked with thiols can reduce the magnetic scattering noise in ferromagnetic devices. The chiral monolayer passivates both magnetic disorder and surface impurities. We ascribe these results to the combination of thiol passivation, with the effect of the chiral-induced spin selectivity effect. The chiral molecules orient the magnetic domain reducing magnetic fluctuations.

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