Achieving large and nonvolatile tunable magnetoresistance in organic spin valves using electronic phase separated manganites.

ABSTRACT: Tailoring molecular spinterface between novel magnetic materials and organic semiconductors offers promise to achieve high spin injection efficiency. Yet it has been challenging to achieve simultaneously a high and nonvolatile control of magnetoresistance effect in organic spintronic devices. To date, the largest magnetoresistance (~300% at T?=?10?K) has been reached in tris-(8-hydroxyquinoline) aluminum (Alq3)-based organic spin valves (OSVs) using La0.67Sr0.33MnO3 as a magnetic electrode. Here we demonstrate that one type of perovskite manganites, i.e., a (La2/3Pr1/3)5/8Ca3/8MnO3 thin film with pronounced electronic phase separation (EPS), can be used in Alq3-based OSVs to achieve a large magnetoresistance (MR) up to 440% at T?=?10?K and a typical electrical Hanle effect as the Hallmark of the spin injection. The contactless magnetic field-controlled EPS enables us to achieve a nonvolatile tunable MR response persisting up to 120?K. Our study suggests a new route to design high performance multifunctional OSV devices using electronic phase separated manganites.

SUBMITTER: Yang W 

PROVIDER: S-EPMC6713754 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature