Exchange bias by molecular spinterface

Abstract

Molecular spins as individual are promising quantum states for coming computation technology. The “on surface” configuration of molecules in proximity to a magnetic film allows control over the orientations of molecular spins and interfacial coupling between them. The stacking of planar molecular spins could favor antiferromagnetic interlayer coupling and induce exchange bias. Here, we show tunable molecular exchange bias and its asymmetrical magnetotransport features by varying composition of ferromagnet/metalloporphyrin bilayers. The systems exhibit a wide range of exchange bias at both magnetization and magnetotransport of anisotropic and angle-dependent magnetoresistance. Theoretical calculations suggest the origin of molecular exchange bias in detail. Finally, we briefly introduce the result of molecular multi-spinterface demonstrated by exchange bias.