Detection of Spin Transfer from Metal to Molecule by Magnetoresistance Measurement.

Gamou, Hiromu; Shimose, Koki; Enoki, Ryoto; Minamitani, Emi; Shiotari, Akitoshi; Kotani, Yoshinori; Toyoki, Kentaro; Nakamura, Tetsuya et al. · Nano Lett · 2020

basic_science · Level V

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Abstract

Localized electronic spin state in molecules has a relatively long spin lifetime and has thus attracted much attention. In this study, we characterize the magnetoresistance of a system comprising Pt and Fe(II)-phthalocyanine (FePc) molecules. The magnetoresistance measurement with the weak antilocalization analysis reveals that a magnetic moment in FePc acts as magnetic impurities for conduction electrons in Pt. Moreover, we find that the magnetoresistance involves a component that possesses the same symmetry as spin-Hall magnetoresistance. These results reveal the spin-angular momentum transfer from metallic Pt to a magnetic moment in FePc molecules, which can be used as a spin torque in a molecular system.