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Role of defect states in magnetic and electrical properties of ZnO nanowires

DSpace at IIT Bombay

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Title Role of defect states in magnetic and electrical properties of ZnO nanowires
 
Creator KUSHWAHA, A
TYAGI, H
ASLAM, M
 
Subject annealing
defect states
diamagnetic materials
electrical conductivity
ferromagnetic materials
II-VI semiconductors
magnetic thin films
nanofabrication
nanomagnetics
nanoparticles
nanorods
nanowires
photoluminescence
semiconductor growth
semiconductor thin films
spectral line intensity
vacancies (crystal)
wide band gap semiconductors
zinc compounds
NANOBELTS
OXIDE
 
Description The perfect crystalline nature along with a defect ridden surface controls the electrical and magnetic properties of ZnO nanowires. Herein, a soft chemical approach is presented to grow ZnO nanowires in powder as well as highly oriented nanowire film form. Photoluminescence measurements reveal high surface defects in as-grown nanowire and post growth annealing treatment in argon and oxygen atmosphere reduces intensity of defect emissions. Magnetic measurements illustrate the ferromagnetic nature of submicron sized zinc oxide (ZnO) nanorods arising due to singly charged oxygen vacancies. Nanowires show diamagnetic behavior when annealed at higher temperature in oxygen while argon annealing does not affect the magnetic behavior. In an analogous manner, we also investigated the effect of surface defects on electrical properties and correlated electrical conductivity with a responsible defect state. Copyright 2013 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4801937]
 
Publisher AMER INST PHYSICS
 
Date 2014-10-16T05:23:34Z
2014-10-16T05:23:34Z
2013
 
Type Article
 
Identifier AIP ADVANCES, 3(4)
http://dx.doi.org/10.1063/1.4801937
http://dspace.library.iitb.ac.in/jspui/handle/100/15327
 
Language en