Physical properties of single-crystalline fibers of the colossal-magnetoresistance manganite La[sub 0.7]Ca[sub 0.3]MnO[sub 3]

Cardoso, C. A.; Araujo-Moreira, F. M.; Andreeta, M. R. B.; Hernandes, A. C.; Leite, E. R.; de Lima, O. F; Mombrú, A. W.; Faccio, R.
October 2003
Applied Physics Letters;10/13/2003, Vol. 83 Issue 15, p3135
Academic Journal
We have grown high-quality single crystals of the colossal-magnetoresistance (CMR) material La[sub 0.7]Ca[sub 0.3]MnO[sub 3] by using the laser heated pedestal growth method. Samples were grown as fibers of different diameters, and with lengths of the order of centimeters. Their composition and structure were verified through x-ray diffraction, scanning electron microcopy with energy dispersive x-ray analysis and by Rietveld analysis. The quality of the crystalline fibers was confirmed by Laue and electron backscatter diffraction patterns. Rocking curves performed along the fiber axis revealed a half-height width of 0.073°. The CMR behavior was confirmed by electrical resistivity and magnetization measurements as a function of temperature. © 2003 American Institute of Physics.


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