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Title: A comparative study of the electron- and hole-doped compositions of single crystalline Nd1-x CaxMnO3 (x = 0.6 and 0.4) by Brillouin scattering
Authors: Seikh, Md Motin
Narayana, Chandrabhas
Cheetham, A K
Rao, C N R
Keywords: Rare earth compounds
Transition element compounds
Inorganic compounds
Antiferromagnetic materials
Orthorhombic lattices
Quaternary compounds
Manganese oxides
Calcium oxides
Neodymium oxides
Composition effect
Electrical conductivity
Issue Date: Dec-2005
Publisher: Elsevier Science BV
Citation: Solid State Sciences 7(12), 1486-1491 (2005)
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 Nd1−xCaxMnO3 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 eg orbitals and the elastic strain is considerably larger in the hole-doped composition containing a larger population of Mn3+ ions.
Description: Restricted Access
Other Identifiers: 1293-2558
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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