Issue 14, 2019

Large magnetoresistance and spin-polarized photocurrent in La2/3Sr1/3MnO3(Co)/quaterthiophene/La2/3Sr1/3MnO3 organic magnetic tunnel junctions

Abstract

Organic magnetic tunnel junctions (OMTJs) have become one of the hot topics in spintronic devices due to their structural adjustability and long spin lifetime. However, the spin-dependent transport properties in OMTJs with different spatial spin-polarized interfaces and their manipulation by light are not yet clear. Here, the spin-dependent transport properties in La2/3Sr1/3MnO3/quaterthiophene/La2/3Sr1/3MnO3 (LSMO/T4/LSMO) and Co/T4/LSMO OMTJs with different spatial spin polarizations and their light modulation are investigated systematically by theoretical calculations. It is found that a large tunneling magnetoresistance (TMR) appears in the OMTJs with a large spatial spin-polarized spinterface, wherein TMR will be reduced in the OMTJs with spatial spin polarization inversed spinterfaces. Furthermore, perfect spin injection efficiency can be obtained in both OMTJs. Specifically, the magnetization alignments of the ferromagnetic electrodes in the Co/T4/LSMO OMTJ can control the switch of the spin channel. Moreover, the fully spin-polarized photocurrent and spin battery appear in parallel and antiparallel magnetization configurations of the LSMO/T4/LSMO OMTJ, respectively. The results contribute to understanding the spin transport properties and designing multifunctional organic spintronic devices.

Graphical abstract: Large magnetoresistance and spin-polarized photocurrent in La2/3Sr1/3MnO3(Co)/quaterthiophene/La2/3Sr1/3MnO3 organic magnetic tunnel junctions

Supplementary files

Article information

Article type
Paper
Submitted
26 Dec 2018
Accepted
04 Mar 2019
First published
05 Mar 2019

J. Mater. Chem. C, 2019,7, 4079-4088

Large magnetoresistance and spin-polarized photocurrent in La2/3Sr1/3MnO3(Co)/quaterthiophene/La2/3Sr1/3MnO3 organic magnetic tunnel junctions

X. Han, W. Mi and X. Wang, J. Mater. Chem. C, 2019, 7, 4079 DOI: 10.1039/C8TC06547K

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements