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Electronic Structure, Electron Field Emission and Magnetic Behaviors of Carbon Nanotubes Fabricated on La0.66Sr0.33MnO3 (LSMO) for Spintronics Application

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Abstract:

This work elucidates the electronic structure, electron field emission and magnetic anisotropic behaviors of single wall carbon nanotubes (SWCNTs) for the spin-electronics device application grown on the La0.66Sr0.33MnO3 (LSMO)/SrTiO3 (STO) substrate. Micro-Raman spectroscopy, X-ray absorption near-edge structure (XANES) and valence-band photoemission spectroscopy (VBPES) were used for the study of electronics structure. The field emission characteristics were studied from the electron field emission current density ( J ) versus applied electric field ( E A ) from which the turn-on electric field ( E TOE)was evaluated. The magnetization behaviors are also presented by the M–H hysteresis loop and were obtained by applying the magnetic field in the parallel and perpendicular direction of the CNTs at 305 K and 5 K temperatures. A magnetic measurement shows that the coercivity of the CNTs/LSMO/STO is higher and has hig anisotropic-nature than the composite LSMO/STO that could be the good material for the future possible spin-electronics device applications.

Keywords: ELECTRON FIELD EMISSION; ELECTRONIC STRUCTURE; LSMO/STO; MAGNETIZATION; SWCNTS

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2011.4070

Publication date: December 1, 2011

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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