Depth Profiling Photoelectron-Spectroscopic Study of an Organic Spin Valve with a Plasma-Modified Pentacene Spacer
Journal
Journal of Physical Chemistry C
Journal Volume
116
Journal Issue
40
Pages
21157-21161
Date Issued
2012
Author(s)
Hong, Jhen-Yong
Chang, Yin-Ming
Chuang, Cheng-Hao
Li, Kai-Shin
Jhang, You-Cih
Shiu, Hung-Wei
Chen, Chia-Hao
Chiang, Wen-Chung
Abstract
We report an enhanced magnetoresistance (MR) in an organic spin valve with an oxygen plasma-treated pentacene (PC) spacer. The spin valve containing PC without the treatment shows no MR effect, whereas those with moderately plasma-treated PC exhibit MR ratios up to 1.64% at room temperature. X-ray photoelectron spectroscopy with depth profiling is utilized to characterize the interfacial electronic properties of the plasma-treated PC spacer which shows the formation of a derivative oxide layer. The results suggest an alternative approach to improve the interface quality and in turn to enhance the MR performance in organic spin valves.
Type
journal article