Room Temperature Ferromagnetism in MWCNTs Synthesized by Chemical Vapor Deposition Technique
- Room Temperature Ferromagnetism in MWCNTs Synthesized by Chemical Vapor Deposition Technique
- 가우탐; V. Rana; 채근화; 송종한; S. Augustine; J. K. Kang; J. Y. Kim; K. Asokan
- CNT; Ferromagnetism; NEXAFS; XMCD
- Issue Date
- The 5th Asia-Oceania Forum on Synchrotron Radiation Research
- 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
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