A comparative study of the electron- and hole-doped compositions of single crystalline $Nd_{1-x}Ca_{x}Mno_{3}$ (x = 0.6 and 0.4) by Brillouin scattering

Seikh, MM and Narayana, C and Cheetham, AK and Rao, CNR (2005) A comparative study of the electron- and hole-doped compositions of single crystalline $Nd_{1-x}Ca_{x}Mno_{3}$ (x = 0.6 and 0.4) by Brillouin scattering. In: Solid State Sciences, 7 (12). pp. 1486-1491.

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Abstract

In order to understand the differences between the nature of the electron- and the hole-doped compositions of rare earth manganates, properties of single crystals of $Nd_{1-x}Ca_{x}MnO_{3}$ with x = 0.6 and 0.4 have been investigated. In the electrical resistivity measurements, the electron-doped (x = 0.6) composition shows no effect of magnetic field unlike the hole-doped (x = 0.4) composition, but both exhibit similar current-induced changes. Brillouin scattering studies show that the x = 0.6 and 0.4 compositions show softening of the modes on cooling the samples towards charge-ordering transitions. The strength of coupling between the $e_{g}$ orbitals and the elastic strain is considerably larger in the hole-doped composition containing a larger population of $Mn^{3+}$ ions.

Item Type:	Journal Article
Publication:	Solid State Sciences
Publisher:	Elsevier Science SAS
Additional Information:	Copyright for this article belongs to Elsevier.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	23 Jan 2006
Last Modified:	19 Sep 2010 04:23
URI:	http://eprints.iisc.ac.in/id/eprint/5201

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