AVS 63rd International Symposium & Exhibition
    Magnetic Interfaces and Nanostructures Tuesday Sessions
       Session MI-TuP

Paper MI-TuP2
The Microstructure and Isotope Effects on Spin Response in Organic Spintronic Devices

Tuesday, November 8, 2016, 6:30 pm, Room Hall D

Session: MIND Poster Session
Presenter: Nuradhika Herath, Oak Ridge National Laboratory
Authors: N. Herath, Oak Ridge National Laboratory
J. Keum, Oak Ridge National Laboratory
H. Zhang, Oak Ridge National Laboratory
K. Hong, Oak Ridge National Laboratory
J. Jakowski, Oak Ridge National Laboratory
J. Huang, Oak Ridge National Laboratory
J. Browning, Oak Ridge National Laboratory
S. Bennett, Oak Ridge National Laboratory
C. Rouleau, Oak Ridge National Laboratory
I. Ivanov, Oak Ridge National Laboratory
V. Lauter, Oak Ridge National Laboratory
Correspondent: Click to Email
There is currently a strong drive to realize magnetoelectronic heterostructures with controls of magnetic ordering and electron-spin transport for use in the next generation spintronic devices. One proposed method to gain such controls is the use organic spintronics (OS). The general configuration of OS device consists of two ferromagnetic (FM) electrodes separated by an organic layer to form a sandwich structure. While basic concepts of OS device have been demonstrated, there is very little understanding about the detailed effects of the organic layer and the interface interactions within the multilayers on the physical properties of the system. Amongst the difficulties limiting high performances OS are the subtle structural variations, including i.e., interdiffusion of FM electrode into the soft organic layer during the fabrication. Using the depth sensitive method of polarized neutron reflectometry we have been able to probe the fine details of the structural and magnetic properties of prototype spintronic devices (STO\\LSMO\polymer\Co\Ag). We fabricated heterostructures using two electron conducting polymers (P3HT and PFO) and their deuterated substitutions to study the isotope effect of polymer layer in the spintronic devices. While our main goal is on understanding the effect of deuterium substitution on the spin-dependent electron transport, in this presentation, we will focus the details of the structural and magnetization profiles on both LSMO\Polymer and polymer\Co interfaces and their impact on the coupling between magnetic layers.

Acknowledgements: This work was sponsored by Oak Ridge National Laboratory Directed Research and Development (LDRD 7938) and conducted at the Center for Nanophase Materials Sciences (CNMS) and Spallation Neutron Source (SNS), which are sponsored at Oak Ridge National Laboratory by the Scientific User Facilities Division, Office of Basic Energy Sciences, U.S. Department of Energy.