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Journal Articles Journal of Physics D: Applied Physics Year : 2020

Temperature dependence of transport mechanisms in organic multiferroic tunnel junctions

Abstract

Organic multiferroic tunnel junctions (OMFTJs) with multi-resistance states have been proposed and drawn intensive interests due to their potential applications, for examples of memristor and spintronics based synapse devices. The ferroelectric control of spin-polarization at ferromagnet (FM)/ferroelectric organic (FE-Org) interface by electrically switching the ferroelectric polarization of the FE-Org has been recently realized. However, there is still a lack of understanding of the transport properties in OMFTJs, especially the interplay between the ferroelectric domain structure in the organic barrier and the spin-polarized electron tunneling through the barrier. Here, we report on a systematic study of the temperature dependent transport behavior in La0.6Sr0.4MnO3/PVDF/Co OMFTJs. It is found that the thermal fluctuation of the ferroelectric domains plays an important role on the transport properties. When T>120K, the opposite temperature dependence of resistance for in up and down ferroelectric polarization states results in a rapid diminishing of tunneling electroresistance. These results contribute to the understanding of the transport properties for designing high performance OMFTJs for memristor and spintronics applications.
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Dates and versions

hal-02881505 , version 1 (26-06-2020)

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Can Xiao, Huawei Sun, Luming Cheng, Xavier Devaux, Anthony Ferri, et al.. Temperature dependence of transport mechanisms in organic multiferroic tunnel junctions. Journal of Physics D: Applied Physics, 2020, 53 (32), pp.325301. ⟨10.1088/1361-6463/ab841b⟩. ⟨hal-02881505⟩
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