Authors: Sousa, C.T.; Lopes, A.M.L.; Proença, M.P.; Leitão, D.C.; Correia, J.G.; Araújo, J.P.

Source: Journal of Nanoscience and Nanotechnology, Volume 9, Number 10, October 2009 , pp. 6084-6088(5)

Publisher: American Scientific Publishers

Abstract:

Highly ordered La_2/3Ca_1/3MnO₃ nanotube arrays were successfully synthesized by a simple and rapid process, combining nanoporous alumina template-assisted synthesis with microwave irradiation. The method offers a quick hands-on route to produce manganite bulk sample and nanotube arrays at relative low-temperatures. We obtain thin wall nanotubes of uniform diameter of 80 nm. The growth mechanism of nanotubes is briefly discussed. Magnetic measurements indicate that the ferromagnetic transition temperature T_C of the nanotubes is depleted with respect to its bulk counterpart possibly due to the geometric confinement imposed by the thin wall of the nanotubes.

Keywords: PEROVSKITE MANGANITE NANOTUBES; NANOPOROUS ALUMINA TEMPLATES; COLOSSAL MAGNETORESISTANCE; MICRO WAVE IRRADIATION

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2009.1572

Publication date: 2009-10-01

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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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