Room Temperature Ferromagnetism in MWCNTs Synthesized by Chemical Vapor Deposition Technique

Title
Room Temperature Ferromagnetism in MWCNTs Synthesized by Chemical Vapor Deposition Technique
Authors
가우탐V. Rana채근화송종한S. AugustineJ. K. KangJ. Y. KimK. Asokan
Keywords
CNT; Ferromagnetism; NEXAFS; XMCD
Issue Date
2010-07
Publisher
The 5th Asia-Oceania Forum on Synchrotron Radiation Research
Abstract
Carbon nanotubes (CNTs) Possess unique mechanical and electronic properties suitable fofabricating the nano-scale building blocks of nanodevices. Such nanoscale magnetic materials ma\be used in spin-dependant electronic devices and magnetic data storage. Because small particle;depend strongly on the size, the control of thdr size and shape is indispensable for advanaapplications. In this study/ MWCNTs synthesized by chemical vapor deposition (CVD) techniqu<are investigated with synchrotron radiations at Pohang Light Source (PLS)/ Korea. Near edg<X-ray absorption spectroscopy (NEXAFS) rneasurement at C K, Co L3,2 and Fe L3,2.-edges, ancX-ray magnetic circular dichroism (XMCD) at Co and Fe L3,2 -edges have been carried at 7KXAS KIST and 2A MS beamline respectively to understand the electronic structure ancresponsible magnetic interactions at room temperature. X-ray absorption spectroscopy (XAS) aC K-edge shows significant p-bonding and Co and Fe L-edges proves the presence of Co2 and Fe2+ in octahedral symmetry. Fe and Co doped MWCNTS shows good XMCD spectra at 300KThe effect on the magnetism is also studied through soft heavy ion (SHI) radiations ancmagnetism is found enhanced[Rg.1] and change in the electronic structure in Co-CNTs is investigated
URI
http://pubs.kist.re.kr/handle/201004/39170
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KIST Publication > Conference Paper
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