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Growth of an ordered array of oriented manganite nanowires in alumina templates

Shankar, Shantha K and Raychaudhuri, AK (2004) Growth of an ordered array of oriented manganite nanowires in alumina templates. In: Nanotechnology, 15 (9). pp. 1312-1316.

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We report the growth of oriented nanowires of manganites within the pores of anodic alumina (AAO) templates. The processing of stoichiometric nanowires of $La_{0.67}Sr_{0.33}MnO_3 (LSMO)$ at relatively low temperatures (870 K) is greatly aided by the linear chain polymer cation complex formed by ethylene glycol. The nanowires were found to grow preferentially along the $\langle110\rangle$ direction of cubic LSMO. The growth of oriented nanowires was achieved by: (a) electrostatically confining the sol particles to the core regions of the cylindrical pores of the template—this avoids heterogeneous nucleation of LSMO on amorphous pore walls and (b) introducing a polymer matrix that serves as a backbone structure to the growing crystallites—this facilitates reorientation of the grains during heat treatment. The nanowires are ferromagnetic at room temperature and exhibit a ferromagnetic transition temperature $(T_c)$ of 370 K.

Item Type: Journal Article
Publication: Nanotechnology
Publisher: Institute of Physics
Additional Information: The copyright of this article belongs to Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 03 Apr 2006
Last Modified: 19 Sep 2010 04:25
URI: http://eprints.iisc.ac.in/id/eprint/6137

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